F. M. M.T., R. Zapata, D. Malagón, and R. Madriñán, “ CHEMICAL ALTERATION OF MATRIX FRAGMENTS AND VOLCANIC GLASS IN THE ANDEAN SOILS AND PALEOSOILS OF THE NORTHERN COLOMBIAN CORDILLERA CENTRAL”, Rev. Acad. Colomb. Cienc. Ex. Fis. Nat., vol. 30, no. 114, pp. 47 – 66, Nov. 2023.