H. Valdivia Fernández and D. Núñez Ato, “Evaluation of the environmental risk of a natural physical type and its relationship with urban planning. Case: Comas district”, Rev. Inst. investig. Fac. minas metal cienc. geogr, vol. 7, no. 13, pp. 45–57, Jul. 2004, doi: 10.15381/iigeo.v7i13.516.