Presented by Prof. Dr. Borislav Bedzhev (Bulgaria)
Author: Mihail Iliev1, Borislav Bedzhev2, Nikolay Nikolov3, Kaloyan Kanchev4
1 University of Ruse, 2 NMU “V. Levski”, 3 State Agency of National Security 4 Konstantin Preslavsky University of Shumen (Bulgaria)