Valentina Spasova Dyankova, PhD
University of Shumen "Episkop Konstantin Preslavski"
FMI, Department of Computer Science
valentina.dyankova@gmail.com

Milko Ivanov Yankov, PhD
University of Shumen "Episkop Konstantin Preslavski"
milkoyankov@gmail.com

Desislava Marangozova
University of Shumen "Episkop Konstantin Preslavski"
desislava.marangozova@gmail.com