Etezadi, Seyed Mehdi, Reza Mohammad Kazem, and Hosein Sadeghi. “The Role of Value Proposition Differentiation in Specialized Medical Centers on the Attraction and Retention of Tourists in Mashhad”. Journal of Management and Business Solutions (July 1, 2025): 1–19. Accessed December 11, 2025. https://www.journalmbs.com/index.php/jmbs/article/view/92.