Novotny, E. H., Auccaise, R., Velloso, M. H. R., Corrêa, J. C., Higarashi, M. M., Abreu, V. M. N., … Kwapinski, W. (2012). Characterization of phosphate structures in biochar from swine bones. Pesquisa Agropecuaria Brasileira, 47(5), 672–676. https://doi.org/10.1590/S1678-3921.pab2012.v47.10029