ENEA, Constanţa. “INCREASED EFFICIENCY ECOLOGICAL - OBJECTIVE OF TOURISM POLICY - AN INTEGRAL PART OF NATIONAL AND WORLD SUSTAINABLE DEVELOPMENT”. Revista de turism - studii și cercetări în turism, no. 9 (June 30, 2010): 49–55. Accessed October 6, 2025. https://revistadeturism.ro/index.php/rdt/article/view/17.