1.
Santos E, I. Correia A, A. Ferreira F, Maria Nunes A, Miranda Veloso C, Vieira E, et al. Productivity Measurement: The Case of Nature Tourism Firms in Portugal. JTSW [Internet]. 2020 Dec. 31 [cited 2025 Oct. 27];8(4):331-46. Available from: https://journals.cinturs.pt/jtsw/article/view/252