Pekarcikova, Miriam, Peter Trebuna, Jana Kronova, and Jan Kopec. “Increasing the Efficiency of the Value-Chain for Non-Manufacturing Processes: Analytical Approach”. European Journal of Business and Management Research 9, no. 3 (June 4, 2024): 91–100. Accessed March 26, 2025. https://ejbmr.org/index.php/ejbmr/article/view/2352.