- Western Sydeny University, Australia, to deliver an invited talk in the Asia Australia Algebra Conference, January 21-25, 2019.
- University of Lisbon, Lisbon, Portugal, to deliver an invited talk in the International Conference on Semigroups and Automata (CSA-2016), June 20-24, 2016.
- University of Coimbra, Portugal, to give a research seminar at Department of Mathematics, June 27, 2016.
- University of Porto, Porto, Portugal, to give a talk and a research seminar in Faculty of Science of the University in June 28, 2016.
Visits to Universites
This section provides details of my visits to various universites for academic purpose.