Brandi IV, Barbosa M, Barata A, De Paula R, Correa T, Lima H, et al. Cave Geomechanical Index (CGI). Classification and Contribution to the Conservation of Natural Caves in the Iron Mines. Geoconserv. Res. 2021 Jan. 10;3(2). Available from: https://oiccpress.com/gcr/article/view/2746