Jasilionienė, Regina, and Rima Tamošiūnienė. “Evaluation of Customer Relationship System Efficiency: Applying of Total Cost of Ownership Approach”. Journal of Business Economics and Management 10, no. 4 (December 31, 2009): 343-347. Accessed November 7, 2024. https://jest.vgtu.lt/index.php/JBEM/article/view/6246.