A.Razmadze Mathematical Inetitute of Tbilisi State University, Georgia;
Institute of Cybernetics (Tbilisi, Georgia);
SNF Center in Non-Commutative Geometry, University of Copenhagen (Denmark);
Hue University (Vietnam);
University of Peloponnese (Greece).
Abdus Salam International Centre for Theoretical Physics, Trieste, Italy;
University of Goettingen, Germany;
Baku State University, Azerbaijan;
Ataturk University, Turkey;
Yildiz Technical University, Turkey.
University of Santiago de Compostela, Spain.
University Paris 13, France.
Institute of Mathematics and Mechanics of National Academy of Sciences of Azerbaijan, Azerbaijan.