Freitas, Ednardo Rodrigues, Nilva Kazue Sakomura, Marcos Martins Gonzalez, and Nei André Arruda Barbosa. 2004. “Comparison of Methods to Measure the Specific Gravity of Laying Hen Eggs”. Pesquisa Agropecuaria Brasileira 39 (5): 509-12. https://doi.org/10.1590/S1678-3921.pab2004.v39.6800.