Filho, J. C. da S., Armelin, M. J. A., & Silva, A. G. da. (1999). Determination of the mineral composition in agroindustrial by-products used in animal nutrition, by neutron activation analysis. Pesquisa Agropecuaria Brasileira, 34(2), 235–241. https://doi.org/10.1590/S1678-3921.pab1999.v34.5166