Oliveira, Mafalda Rangel, Jorge Gonçalves, Carlos Costa, Laura Diniz Leite, and Karim Erzini. “Implementation of Eco-Tourist Underwater Routs in the Algarve (south of Portugal) As a Way of Preserving Exuberant Marine Ecosystems”. Journal of Tourism & Development 3, no. 13/14 (January 1, 2010): 1161-1162. Accessed May 18, 2024. https://proa.ua.pt/index.php/rtd/article/view/13303.