S. de S. Braga, A. Guzzi, A. R. C. Perinotto, and G. A. P. Malta, “Analysis of the tourist attractiveness of the coast of Piauí, Brazil: update of the evaluation of tourist attractions between 2010 and 2020”, Rev. Tur. Anál., vol. 33, no. 1, pp. 29–49, Apr. 2022, doi: 10.11606/issn.1984-4867.v33i1p29-49.