Končar, Jelena, Radenko Marić, and Goran Vukmirović. “Analysis of Key Indicators That Affect the Expected Benefit of Customers When Using Loyalty Cards”. Journal of Business Economics and Management 20, no. 5 (June 26, 2019): 821-840. Accessed November 1, 2024. https://jcem.vgtu.lt/index.php/JBEM/article/view/10186.