Peter Danchev, Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, Bulgaria
Gian Mario Gianella, Universita di Torino, Italy
Hon Ming Ho, Hong Kong University of Science and Technology, Hong Kong
Doha Kattan, King Abdulaziz University, Saudi Arabia
Berhanu Kidane, University of North Georgia, USA
Rita Vincenti, University of Perugia, Italy