
Vice-Rector, Shumen University, Bulgaria

UNIVERSITY OF BELGRADE
FACULTY OF AGRICULTURE, SERBIA

UNIVERSITY OF THE AZORES, PORTUGAL
SCHOOL OF AGRARIAN AND ENVIRONMENTAL SCIENCES

UNIVERSIDADE DE TRÁS-OS-MONTES E ALTO DOURO
Vila Real, Portugal

UNIVERSITY OF BELGRADE
FACULTY OF AGRICULTURE, SERBIA

Shumen University, Bulgaria

FOOD AND AGRICULTURE VOCATIONAL SCHOOL,
FORESTRY DEPARTMENT, ÇANKIRI, TURKEY

UNIVERSITY OF BELGRADE
FACULTY OF AGRICULTURE, SERBIA

BYDGOSZCZ UNIVERSITY OF SCIENCE AND
TECHNOLOGY, FACULTY OF AGRICULTURE AND
BIOTECHNOLOGY, POLAND