[1] ``On a problem of P. Erdos.'' Acta Mathematica Hungarica, 60 (1-2), 1992, pp. 271-282.
[2] ``Cycles in bipartite graphs and an application in Number Theory.'' Journal of Graph Theory, 19 (3), 1995, pp. 323-331.
[3] ``On sums with small prime factors.'' Acta Mathematica Hungarica, 67 (4), 1995, pp. 333-345.
[4] ``Proof of a packing conjecture of Bollobas.'' Combinatorics, Probability and Computing, 4, 1995, pp. 241-255 (with János Komlós, Endre Szemerédi).
[5] ``On the square of a Hamiltonian cycle in dense graphs.'' Random Structures and Algorithms, 9, 1996, pp. 193-211 (with János Komlós, Endre Szemerédi).
[6] ``On cycles in the coprime graph of integers.'' Electronic Journal of Combinatorics, 4 (2), 1997, #R8 (with Paul Erdos). ( pdf file)
[7] ``Blow-up Lemma.'' Combinatorica, 17 (1), 1997, pp. 109-123 (with János Komlós, Endre Szemerédi). ( pdf file)
[8] ``An algorithmic version of the Blow-up Lemma.'' Random Structures and Algorithms, 12, 1998, pp. 297-312 (with János Komlós, Endre Szemerédi). ( pdf file)
[9] ``On the Pósa-Seymour conjecture.'' Journal of Graph Theory, 29, 1998, pp. 167-176 (with János Komlós, Endre Szemerédi). ( pdf file)
[10] ``Proof of the Seymour conjecture for large graphs.'' Annals of Combinatorics, 1, 1998, pp. 43-60 (with János Komlós, Endre Szemerédi). ( pdf file)
[11] ``Counting irregular multigraphs.'' Discrete Mathematics, 195, 1999, pp. 235-237 (with Aron Atkins and Stanley Selkow). ( pdf file)
[12] ``Complete tripartite subgraphs in the coprime graph of integers.'' Discrete Mathematics, 202, 1999, pp. 227-238. ( pdf file)
[13] ``On k-ordered Hamiltonian graphs.'' Journal of Graph Theory 32, 1999, pp. 17-25 (with Hal Kierstead, Stanley Selkow). ( pdf file)
[14] ``Vertex partitions by connected monochromatic k-regular graphs.'' Journal of Combinatorial Theory Series B, 78, 2000, pp. 115-122 (with Stanley Selkow). ( pdf file)
[15] ``On edge colorings with at least q colors in every subset of p vertices.'' Electronic Journal of Combinatorics 8, 2001, #R9 (with Stanley Selkow). ( pdf file)
[16] ``Spanning trees in dense graphs.'' Combinatorics, Probability and Computing 10, 2001, pp. 397-416 (with János Komlós, Endre Szemerédi). ( pdf file)
[17] ``Proof of the Alon-Yuster conjecture.'' Discrete Mathematics 235, 2001, pp. 255-269 (with János Komlós, Endre Szemerédi). ( pdf file)
[18] ``On the number of Hamiltonian cycles in Dirac graphs.'' Discrete Mathematics 265, 2003, pp. 237-250 (with Stanley Selkow, Endre Szemerédi). ( pdf file)
[19] ``On bipartite generalized Ramsey theory.'' Ars Combinatoria 68, 2003, pp. 57-64 (with Stanley Selkow).
[20] ``An application of the Regularity Lemma in generalized Ramsey theory.'' Journal of Graph Theory 44, 2003, pp. 39-49 (with Stanley Selkow). ( pdf file)
[21] ``An extension of the Ruzsa-Szemerédi Theorem.'' Combinatorica 25 (1), 2005, pp. 77-84 (with Stanley Selkow). ( pdf file)
[22] ``On a Turán-type hypergraph problem of Brown, Erdos and T. Sós.'' Discrete Mathematics 297, 2005, pp. 190-195 (with Stanley Selkow). ( pdf file)
[23] ``On partial block designs with large blocks.'' Discrete Mathematics 305, 2005, pp. 264-275 (with András Sárközy). ( pdf file)
[24] ``On an anti-Ramsey problem of Burr, Erdos, Graham and T. Sós.'' Journal of Graph Theory 52, 2006, pp. 147-156 (with Stanley Selkow). ( pdf file)
[25] ``An improved bound for the monochromatic cycle partition number.'' Journal of Combinatorial Theory, Ser. B 96, 2006, pp.855-873 (with András Gyárfás, Miklós Ruszinkó and Endre Szemerédi). ( pdf file)
[26] ``One-sided coverings of colored complete bipartite graphs.'' in Topics in Discrete Mathematics (dedicated to J. Nesetril on his 6oth birthday), Algorithms and Combinatorics 26 (M. Klazar et al eds.), Springer, Berlin, 2006, pp. 133-154. (with András Gyárfás, Miklós Ruszinkó and Endre Szemerédi). ( ps file)
[27] ``Three color Ramsey numbers for paths.''
Combinatorica 27 (1), 2007, pp. 35-69
(with András Gyárfás, Miklós Ruszinkó and
Endre Szemerédi),
(
pdf file)
[28] ``Tripartite Ramsey numbers for paths.'' Journal of Graph Theory 55, 2007, pp. 164-174 (with András Gyárfás, Miklós Ruszinkó and Endre Szemerédi). ( pdf file)
[29] ``Corrigendum: Three color Ramsey numbers for paths''
(Combinatorica 27 (1), 2007, pp. 35-69). Combinatorica 28 (4), 2008, pp. 499-502
(with András Gyárfás, Miklós Ruszinkó and
Endre Szemerédi),
(
pdf file)
[30] ``Monochromatic Hamiltonian Berge-cycles in colored complete uniform hypergraphs.'' Journal of Combinatorial Theory, Ser. B 98, 2008, pp. 342-358 (with András Gyárfás, Jeno Lehel and Richard Schelp). ( pdf file)
[31] ``On 2-factors with k components.'' Discrete Mathematics 308, 2008, pp. 1962-1972. ( pdf file)
[32] ``Size of monochromatic components in local edge colorings.'' Discrete Mathematics 308, 2008, pp. 2620-2622 (with András Gyárfás). ( pdf file)
[33] ``Inequalities for the First-Fit chromatic number.'' Journal of Graph Theory 59, 2008, pp. 75-88 (with Zoltán Furedi, András Gyárfás and Stanley Selkow). ( pdf file)
[34] ``Monochromatic Hamiltonian t-tight Berge-cycles in hypergraphs.'' Journal of Graph Theory 59, 2008, pp. 34-44 (with Paul Dorbec and Sylvain Gravier). ( pdf file)
[35] ``Distributing vertices along a Hamiltonian cycle in Dirac graphs.'' Discrete Mathematics 308, 2008, pp. 5757-5770 (with Stanley Selkow). ( pdf file)
[36] ``The Ramsey number of diamond-matchings and loose cycles in hypergraphs.'' Electronic Journal of Combinatorics 15 (1), 2008, #R126 (with András Gyárfás and Endre Szemerédi). ( pdf file)
[37] ``Size of monochromatic double stars in edge colorings.'' Graphs and Combinatorics 24, 2008, pp. 531-536 (with András Gyárfás). ( pdf file)
[38] ``A fast parallel algorithm for finding Hamiltonian cycles in dense graphs.'' Discrete Mathematics 309, 2009, pp. 1611-1622. ( pdf file)
[39] ``Multipartite Ramsey numbers for odd cycles.'' Journal of Graph Theory 61, 2009, pp. 12-21 (with András Gyárfás and Richard Schelp). ( pdf file)
[40] ``Stability of the path-path Ramsey number.'' Discrete Mathematics 309, 2009, pp. 4590-4595 (with András Gyárfás and Endre Szemerédi). ( pdf file)
[41] ``How to avoid using the Regularity Lemma; Pósa's Conjecture revisited.'' Discrete Mathematics 310, 2010, pp. 630-641 (with Ian Levitt and Endre Szemerédi). ( pdf file)
[42] ``Gallai colorings of non-complete graphs.'' Discrete Mathematics 310, 2010, pp. 977-980 (with András Gyárfás). ( pdf file)
[43] ``Monochromatic Hamiltonian 3-tight Berge cycles in 2-colored 4-uniform hypergraphs.'' Journal of Graph Theory 63, 2010, pp. 288-299 (with András Gyárfás and Endre Szemerédi). ( pdf file)
[44] ``Long monochromatic Berge cycles in colored 4-unform hypergraphs.'' Graphs and Combinatorics 26, 2010, pp. 71-76 (with András Gyárfás and Endre Szemerédi). ( pdf file)
[45] ``Ramsey-type results for Gallai-colorings.'' Journal of Graph Theory 64, 2010, pp. 233-243 (with András Gyárfás, András Sebo and Stanley Selkow). ( pdf file)
[46] ``Monochromatic matchings in the shadow graph of almost complete hypergraphs.'' Annals of Combinatorics 14, 2010, pp. 245-249 (with András Gyárfás and Endre Szemerédi). ( pdf file)
[47] ``The 3-color Ramsey number of a 3-uniform Berge-cycle.'' Combinatorics, Probability and Computing 20, 2011, pp. 53-71 (with András Gyárfás). ( pdf file)
[48] ``Monochromatic cycle partitions of edge-colored graphs.'' Journal of Graph Theory 66, 2011, pp. 57-64. ( pdf file)
[49] ``Partitioning 3-colored complete graphs into three monochromatic cycles.''
Electronic Journal of Combinatorics 18, 2011, #P53
(with András Gyárfás, Miklós Ruszinkó and
Endre Szemerédi).
(
pdf file)
[50] ``Long rainbow cycles in proper edge-colorings of complete graphs.'' Australasian Journal of Combinatorics 50, 2011, pp. 45-53 (with András Gyárfás, Miklós Ruszinkó and Richard Schelp). ( pdf file)
[51] ``Spectral Clustering in Educational Data Mining.'' Proceedings of the 4th International Conference on Educational Data Mining, 2011, pp. 129-138 (with Shubhendu Trivedi, Zach Pardos and Neil Heffernan). ( pdf file)
[52] ``Vertex partitions of non-complete graphs by connected monochromatic k-regular graphs.'' Discrete Mathematics 311, 2011, pp. 279-284 (with Stanley Selkow and Fei Song). ( pdf file)
[53] ``Coverings by monochromatic pieces - problems for the Emlektabla workshop.'' Proceedings of the 3rd Emlektabla Workshop, Janos Bolyai Mathematical Society, 2011, pp. 1-9. ( pdf file)
[54] ``Star versus two stripes Ramsey numbers and a conjecture of Schelp.'' Combinatorics, Probability and Computing 21, 2012, pp. 179-186. (with András Gyárfás). ( pdf file)
[55] ``Clustered knowledge tracing.'' Proceedings of the 11th International Conference on Intelligent Tutoring Systems, LNCS 7315, pp. 407–412, 2012, Springer-Verlag Berlin Heidelberg (with Zach Pardos, Shubhendu Trivedi and Neil Heffernan). ( pdf file)
[56] ``Co-Clustering by bipartite spectral graph partitioning for out-of-tutor prediction.'' Proceedings of the 5th International Conference on Educational Data Mining, 2012, pp. 33-40 (with Zach Pardos, Shubhendu Trivedi and Neil Heffernan). ( pdf file)
[57] ``An improved bound for vertex partitions by connected monochromatic k-regular graphs.'' Journal of Graph Theory 73, 2013, pp. 127-145. (with Stanley Selkow and Fei Song). ( pdf file)
[58] ``Monochromatic path and cycle partitions in hypergraphs.'' Electronic Journal of Combinatorics 20, 2013, P18. (with András Gyárfás). ( pdf file)
[59] ``Rainbow matchings and partial transversals of Latin squares.'' Accepted for publication in Discrete Mathematics (with András Gyárfás). ( pdf file)
[60] ``Partitioning edge-2-colored graphs by monochromatic paths and cycles.'' Accepted for publication in Combinatorica (with Jozsef Balog, Janos Barat, Daniel Gerbner and András Gyárfás). ( pdf file)
[61] ``Predicting long term student retention using expanded PFA and clustering.'' Accepted for publication in FLAIRS (with Fei Song, Shubhendu Trivedi, Yutao Wang and Neil Heffernan). ( pdf file)
[62] ``Improved monochromatic loose cycle partitions in hypergraphs.'' Submitted for publication to Discrete Mathematics. ( pdf file)
[63] ``Coverings by few monochromatic pieces - a transition between two Ramsey problems.'' Submitted for publication to Graphs and Combinatorics (with András Gyárfás and Stanley Selkow). ( pdf file)
[64] ``A Practical regularity partitioning algorithm and its applications in clustering.'' Submitted for publication (with Fei Song, Endre Szemerédi and Shubhendu Trivedi). ( pdf file)
[65] ``Ramsey numbers for bipartite graphs with small bandwidth.'' Accepted in Eurocomb 2013 (with G.O. Mota, M. Schacht, A. Taraz). ( pdf file)