Authors
dzheni.karadzhova.20@trakia-uni.bg
Faculty of Technics and Technologies, Trakia University, Yambol, Bulgaria
miroslav.vasilev@trakia-uni.bg
Faculty of Technics and Technologies, Trakia University, Yambol, Bulgaria
Faculty of Agriculture, Trakia University, Stara Zagora, Bulgaria
Faculty of Technics and Technologies, Trakia University, Yambol, Bulgaria