Harazin, Piroska, Gréta Judit Dezső, and Andrea Karcagi-Kováts. “Material Flows and Stocks of a Service Company from Debrecen”. International Journal of Engineering and Management Sciences 4, no. 4 (December 12, 2019): 313–321. Accessed May 3, 2024. https://ojs.lib.unideb.hu/IJEMS/article/view/5364.