1. Lecturer, Faculty of Economics and Agribusiness, Agricultural University of Tirana, 1025 Tirana, Albania.
2. Lecturer, Faculty of Tropical Agri Sciences, Czech University of Life Sciences Prague and CERGE EI, 16500 Prague, Czech Republic.
3. Professor, Hochschule Geisenheim University, Von-Lade-Straβe 1, 65366 Geisenheim, Germany.
4. Lecturer, University ‘UKSHIN HOTI’ Prizren, Republic of Kosovo.