(Kazakhstan) Ministry of Education and Sciences - Institute of Mathematics, Almaty.

(Brunei) Universiti Brunei Darussalam - Department of Mathematics.

(Macau) University of Macau - Mathematics Programme.

(Vietnam) Hanoi University of Technology - Faculty of Applied Mathematics.

(Azerbaijan) Khazar University - Department of Mathematics.

Azerbaijan Academy of Sciences - Institute of mathematics and mechanics.

(Vietnam) National Centre for Science and Technology, Hanoi - Institute of Mathematics.