M. Qafleshi
University for Business and Technology, Kalabria, 10000 Prishtina, Kosovo
Albania

M. K. Xhixha
University Aleksandër Moisiu Durrës, Faculty of Professional Studies, Str. Currila 14, Durrës, Albania
Albania

G. Nafezi
University of Prishtina “Hasan Prishtina”, Faculty of Mathematical and Natural Sciences, Str. "Nëna Terezë", no.n.,10000 Prishtina, Kosovo

D. Kryeziu
University for Business and Technology, Kalabria, 10000 Prishtina, Kosovo

D. Qafleshi
University for Business and Technology, Kalabria, 10000 Prishtina, Kosovo