Novotny, E. H.; Auccaise, R.; Velloso, M. H. R.; Corrêa, J. C.; Higarashi, M. M.; Abreu, V. M. N.; Rocha, J. D.; Kwapinski, W. Characterization of Phosphate Structures in Biochar from Swine Bones. PAB 2012, 47 (5), 672-676. https://doi.org/10.1590/S1678-3921.pab2012.v47.10029.