Lazarević, Dragan, Momčilo Dobrodolac, Libor Švadlenka, and Bojan Stanivuković. “A Model for Business Performance Improvement: A Case of the Postal Company”. Journal of Business Economics and Management 21, no. 2 (April 1, 2020): 564-592. Accessed December 4, 2024. https://jcem.vgtu.lt/index.php/JBEM/article/view/12193.