Muharemović, Ermin, Amel Kosovac, Katarina Mostarac, and Muhamed Begović. “A Proposed Outsourcing Model for Pick-up and Delivery Processes”. Science, Engineering and Technology 2, no. 1 (April 30, 2022): 1–6. Accessed September 28, 2025. https://setjournal.com/SET/article/view/23.