Milcken, Nelson Calixto, et al. “TRANSFORMATION OF MONOCALCIC PHOSPHATE IN BICALCIC PHOSPHATE”. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], vol. 12, no. 1, Nov. 2007, pp. 21-30, https://revistas.ufg.br/pat/article/view/2418.