Tushevska Gavrilovikj, B., and V. Sakleva. “SYSTEMS OF CONTROL IN PUBLIC PROCUREMENT WITH SPECIAL REVIEW ON PREVIOUS (EX-ANTE) PROCEDURE”. Proceedings of the International Scientific Conference "Social Changes in the Global World", Vol. 1, no. 7, Dec. 2020, pp. 459-85, doi:10.46763/scgw/article/view/4061.