Montaño-Valle, A. (2016). Sustainability strategy as a source of competitive advantages in the tourism industry. A model for the integration of natural resources: Supervisors: Dr. Alfonso Vargas-Sánchez. Institution awarding the Ph. D. Degree: University of Huelva, Spain. Date of defence: 30/06/2015. European Journal of Tourism Research, 14, 106–109. Retrieved from https://ejtr.vumk.eu/index.php/about/article/view/247