Vanya Stoykova Faculty of Technics and Technologies of Yambol, Trakia University of Stara Zagora, Bulgaria
Zlatina Kazlacheva Faculty of Technics and Technologies of Yambol, Trakia University of Stara Zagora, Bulgaria
Tanya Pehlivanova Faculty of Technics and Technologies of Yambol, Trakia University of Stara Zagora, Bulgaria
Krasimir Trendafilov Faculty of Technics and Technologies of Yambol, Trakia University of Stara Zagora, Bulgaria
Nely Georgieva Faculty of Technics and Technologies of Yambol, Trakia University of Stara Zagora, Bulgaria
Stanka Baycheva Faculty of Technics and Technologies of Yambol, Trakia University of Stara Zagora, Bulgaria
Ira Taneva Faculty of Technics and Technologies of Yambol, Trakia University of Stara Zagora, Bulgaria
Petya Dineva Faculty of Technics and Technologies of Yambol, Trakia University of Stara Zagora, Bulgaria
Zlatin Zlatev Faculty of Technics and Technologies of Yambol, Trakia University of Stara Zagora, Bulgaria