Hadad, Yossi, Lea Friedman, and Aviad A. Israeli. “Evaluating Hotel Advertisements Efficiency Using Data Envelopment Analysis”. Journal of Business Economics and Management 5, no. 3 (September 30, 2004): 133-141. Accessed November 20, 2024. https://jau.vgtu.lt/index.php/JBEM/article/view/8189.