[1] Power integral bases in biquadratic number fields, 15th Czech and Slovak International Conference on Number Theory, 3-8 September 2001, Ostravice (Czech Republic).

[2] Index form equations in biquadratic number fields (in Hungarian), Conference on Number Theory to the Memory of Péter Kiss, 22-23 November 2002, Eger.

[3] Index form equations in biquadratic and multiquadratic number fields, Workshop on Computational Number Therory, 20-24 October 2003, Debrecen.

[4] Divisibility of binomial coefficients (in Hungarian), Diophantine Day in Sopron, 9 October 2004, Sopron.

[5] Power integral bases in composites of quadratic number fields (in Hungarian), Cryptography and Diophantine Day in Nyíregyháza, 30 April 2005, Nyíregyháza.

[6] The field index of some families of number fields, 17th Czech and Slovak International Conference on Number Theory, 5-10 September 2005, Malenovice (Czech Republic).

[7] Field index of algebraic number fields (in Hungarian), Diophantine and Cryptography Days in Berekfürdő, 22 April 2006, Berekfürdő.

[8] A divisibility problem of binomial coefficients, 18th Czech and Slovak International Conference on Number Theory, 27-31 August 2007, Smolenice (Slovakia).

[9] The solution of a divisibility problem related to binomial coefficients (in Hungarian), Number Theory and Cryptography Days in Eger, 6 October 2007, Eger.

[10] Ordered r-Bell numbers and r-Eulerian numbers (in Hungarian), Diophantine and Cryptography Days in Sopron, 11 October 2008, Sopron.

[11] Field index of algebraic number fields, 19th Czech and Slovak International Conference on Number Theory, 31 August-4 September 2009, Hradec nad Moravicí (Czech Republic).

[12] Van der Waerden type numbers for linear recurrence sequences, Number Theory and Its Applications, International Conference Dedicated to Kálmán Győry, Attila Pethő, János Pintz and András Sárközy, 4-8 October 2010, Debrecen.

[13] Van der Waerden type numbers for linear recurrence sequences, Paul Turán Memorial Conference, 22-26 August 2011, Budapest.

[14] Monogeneous dihedral quartic extensions of quadratic fields, 20th Czech and Slovak International Conference on Number Theory, 5-9 September 2011, Stará Lesná (Slovakia).

[15] Stirling numbers of the second kind and Bell numbers for graphs, 15th International Conference on Fibonacci Numbers and Their Applications, 25-30 June 2012, Eger.

[16] The r-generalization of combinatorial numbers, Seventh Czech-Slovak International Symposium on Graph Theory, Combinatorics, Algorithms and Applications, 7-13 July 2013, Košice (Slovakia).

[17] Recent results on field indices, 21st Czech and Slovak International Conference on Number Theory, 2-6 September 2013, Ostravice (Czech Republic).

[18] The r-generalization of combinatorial numbers, 32. Kolloquium über Kombinatorik, 8-9 November 2013, Ilmenau (Germany).

[19] Generalization of combinatorial numbers for graphs (in Hungarian), Number Theory and Cryptography Days in Komárno, 24 May 2014, Komárno (Slovakia).

[20] Generalization of combinatorial numbers for graphs, 5th Polish Combinatorial Conference, 22-26 September 2014, Będlewo (Poland).

[21] Stirling, Bell and Fubini numbers for graphs, 33. Kolloquium über Kombinatorik, 7-8 November 2014, Ilmenau (Germany).

[22] Generalization of enumeration polynomials for graphs, 8th Slovenian Conference on Graph Theory, 21-27 June 2015, Kranjska Gora (Slovenia).

[23] Monochromatic linear recurrence sequences, 29th Journées Arithmétiques, 6-10 July 2015, Debrecen.

[24] A Ramsey type problem for linear recurrence sequences, 22nd Czech and Slovak International Conference on Number Theory, 31 August-4 September 2015, Liptovský Ján (Slovakia).

[25] Recent results on generalizations of Bell numbers, 17th International Conference on Fibonacci Numbers and Their Applications, 27 June-2 July 2016, Caen (France).

[26] New combinatorial interpretations of some variants of Stirling and Bell numbers, Veszprém Discrete Mathematics and Applications Conference, 25-29 June 2018, Veszprém.