Costa, V., Fialho, E. T., Gomes, P. C., & Ferreira, A. S. (2014). Protein and energy levels in creep feed rations for suckling pigs. Pesquisa Agropecuaria Brasileira, 18(10), 1155–1161. https://doi.org/10.1590/S1678-3921.pab1983.v18.15453