Carvalho Sousa Val, E. N. ., Hernández Santoyo, A., Ciro de Oliveira, D. ., & Freire da Rocha Jr, W. . (2020). Economic valuation of ecosystem goods and services in the Serra da Capivara National Park: an approach based on the Travel Cost Method. Sociedade & Natureza, 32, 766–777. https://doi.org/10.14393/SN-v32-2020-54557