Mattar, Eduardo Pacca Luna, et al. “Physical-Chemical Characterization of Bovine Bone Ash for Evaluating Its Potential Agricultural Use”. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], vol. 1, no. 1, Apr. 2014, pp. 65-70, https://doi.org/10.5216/pat.v1i1.24421.