J. C. P. Ferreira, Ian, Martin, C. R. Irikura, L. U. Gimenes, C. J. Fujiraha, A. M. Jorge, and E. Oba. "ULTRASONOGRAPHIC MONITORING OF EARLY PREGNANCY DEVELOPMENT IN MURRAH BUFFALO HEIFERS (BUBALUS BUBALIS)." Journal of Animal and Plant Sciences, vol. 22, no. 3, 2012, pp. 377-383.