July 26 - August 31, 1997, International Summer School, Perugia, Italy.

 July 12 - August 1, 1998, International Summer School, Cortona, Italy, with topic: "Elliptic  Differential Equation".

 April 6 - May 7, 1999, International Spring School, Groningen, Holland, with topic: " Aspects of Differential Equation".

 26-28 October, 1999, International Seminar on Fixed Point Theory, Cluj-Napoca, Romania,  title of communication: "Some generalisation of Edelstein's theorem for operators on product spaces".

 23-29 Mai 2000, Itinerant Seminar Tiberiu Popoviciu of Functional Equations, Aproximation and Convexity, Cluj-Napoca, title of communication “Existence of positive solutions for Chandrasekhar's equation”.

 ICNODEA 2001, International Conference on Nonlinear Operators, Differential Equations and Applications, Cluj-Napoca, România, (invited conference), September, 12 - 15, 2001, title of the conference: “Fixed Point Theorems for Operators on Cartesian Product Spaces and Applications”.

 October 4-7,  2001, International Conference of  PAMM 135, Baia-Mare – Borşa, title of communication: “Global Asymptotic Stability Results for Some Difference Equations”.

 MACS5, 5^th Joint Conference on Mathematics and Computer Science, Debrecen, Hungary, June 9 – 12, 2004, title of communication: “Exponential stability for equilibrium solution of some difference equations”.

 ICNODEA 2004, International Conference on Nonlinear Operators, Differential Equations and Applications, Cluj-Napoca, România, 24 - 27 August 2004, title of the conference: “Fixed Point Theorems for Operators on Cartesian Product on Uniform Spaces”.

 ICAM4, 4^th International Conference on Applied Mathematics, September 23 – 26, 2004, Baia-Mare – Suior, România, , title of the conference: “Applications of Fixed Point Theorems on Cartesian Product Spaces”.

 The 10^th International Conference on Applied Mathematics, Computer Science and Mechanics, Cluj-Napoca/ Baisoara, “Thedor Angheluta Seminar”, May 31 – June 1, 2006, title of the communication: “An existence result for mixed-type functional integro-differential equation”.

 MACS6, 6^th Joint Conference on Mathematics and Computer Science, July 12-15, 2006, Pecs, Hungary, title of communication: “Integral equations via weakly Picard operators technique”.

 8^eme Colloque Franco-Roumain de Mathematiques Appliquees, August 28 – September 1 , Chambery, France, title of communication: “Data dependence for some integral equations”.

 ICAM5, 5^th International Conference on Applied Mathematics, September 21-24, 2006, Baia-Mare, Romania, title of communication: “Data dependence for some integral equations”.

 ICNODEA 2007, International Conference on Nonlinear Operators, Differential Equations and Applications, Cluj-Napoca, România, July 4 - 7, 2007, title of the conference: “Fixed Point Theorems for Operators on Cartesian Product ”.

 The 11^th International Conference on Applied Mathematics and Computer Science, “Thedor Angheluta Seminar”, Baisoara, Romania, September 6 - 9, 2007, title of communication: “Fibre contraction theorem in generalized metric spaces”.

 The 12^th International Conference on Applied Mathematics and Computer Science, “Thedor Angheluta Seminar”, Baisoara, Romania, September 10 - 13, 2008, title of communication: "Spaces with perturbed metrics and fixed point theorems".

 ICAM6, 6^th International Conference on Applied Mathematics, September 18-21, 2008, Baia-Mare, Romania, title of communication: "Fixed point theorems for triangular operators".

 ICAM6, 7^th International Conference on Applied Mathematics, September 1-4, 2010, Baia-Mare, Romania, title of communication: "Abstract fixed point principles via perturbed metrics".

 ICNODEA 2011, International Conference on Nonlinear Operators, Differential Equations and Applications, Cluj-Napoca, România, July 5 - 8, 2011, title of communication: "A generalization of the fibre contraction principle".

 SYNASC 2011, 13^th Symposium on Symbolic and Numeric Algorithms for Scientific Computing, Timişoara, România, September 26 - 29, 2011, Workshop on Iterative Approximation of Fixed Points, title of communication: "Step method for some integral equations".