Hadad, Yossi, Lea Friedman, and Aviad A. Israeli. “Evaluating Hotel Advertisements Efficiency Using Data Envelopment Analysis”. Journal of Business Economics and Management 6, no. 3 (September 30, 2005): 145-153. Accessed November 9, 2024. https://mma.vgtu.lt/index.php/JBEM/article/view/8123.