Figueiredo Monteiro, António, André Vieira Sá, y Emanuel De Castro. «Studying the Degree of Granite Alteration Using Open Spatial Data Platforms. Case Studies: Guarda Urban Area and Estrela Geopark». REVISTA INTERNACIONAL MAPPING 29, no. 202 (noviembre 1, 2020): 06–13. Accedido abril 26, 2024. https://ojs.revistamapping.com/MAPPING/article/view/335.