Љубојевић, Гордана, Чедомир Љубојевић, and Нина Максимовић. “Proactive Approach to Contracts As a Source of a Company Competitive Value”. Hotel and Tourism Management 4, no. 2 (December 31, 2016): 133–141. Accessed January 31, 2026. https://htmanagementvb.com/index.php/HITM/article/view/103.