Miguel José Oliveira and Fátima Farinha and Elisa M. J. da Silva and Rui Lança and Manuel Duarte Pinheiro and Cátia Miguel, Observatory of Sustainability of the Algarve Region for Tourism: Proposal for Environmental and Sociocultural Indicators. journal = {International Journal of Humanities and Social Sciences}, [online]. World Academy of Science, Engineering and Technology. August 2019, vol. 153(9). 1235 - 1242 [viewed 20 September 2024]. Available from: https://publications.waset.org/pdf/10010749.