Silva, Sérgio Ricardo Almada, et al. “Tourism and Educational Use of Geological Sites: Preliminary Study in the Lower Negro River Region, Amazonas, Brazil”. Geologia USP. Série Científica, vol. 23, no. 2, Sept. 2023, pp. 139-52, https://doi.org/10.11606/issn.2316-9095.v23-204678.