KIDO, A.; SEIDL, A.; LOOMIS, J. Panel estimators that combine travel cost and contingent behavior data sets for evaluating protected areas. Agricultura, Sociedad y Desarrollo, [S. l.], v. 2, n. 2, p. 75–82, 2005. Disponível em: https://www.revista-asyd.org/index.php/asyd/article/view/1043. Acesso em: 16 apr. 2026.