D. J. D. B. Castro and D. R. do Nascimento Carvalho, “Contingent Valuation Method in a Pandemic Period: Diagnosis for the Search of New Directions”, ijaers, vol. 9, no. 7, Jul. 2022, Accessed: Aug. 25, 2024. [Online]. Available: https://journal-repository.com/index.php/ijaers/article/view/5226