Otero, Lazara. “Contribution of Exchanger Particles to the Cation Exchange Capacity in Rice Soils from the Flat Oreas of South of Havana and Pinar Del Río”. REVISTA TERRA LATINOAMERICANA, vol. 24, no. 1, Mar. 2006, p. 9, https://terralatinoamericana.org.mx/index.php/terra/article/view/1525.