Martínez, Gustavo A., Lourdes Peña-Córdova, and Luis A. Figueroa. “A Thermodynamic Evolution of the Addition of Calcium and Magnesium to an Ultisol: I - Ca (OH)2 Addition”. The Journal of Agriculture of the University of Puerto Rico 78, no. 3-4 (October 1, 1994): 99–110. Accessed April 16, 2024. https://revistas.upr.edu/index.php/jaupr/article/view/4278.