Author/Authors :
Vu, H. Faculty of Mathematical Economics - Banking University of Ho Chi Minh City, Vietnam. , Rassias, J. M. Pedagogical Department E. E. - Section of Mathematics and Informatics National and Capodistrian University of Athens, Athens, GREECE , Van Hoa, N. Division of Computational Mathematics and Engineering - Institute for Computational Science - Ton Duc Thang University, Ho Chi Minh City, Vietnam