Candini, P. H.; Moretti, A. de S.; Zanella, E. L.; Silveira, P. R. S. da; Viana, C. H. C.; Santos, I. Single or Double Artificial Insemination in Fixed Time in Sows With Ovulation Induced by Luteinizing Hormon. Braz. J. Vet. Res. Anim. Sci. 2004, 41 (2), 124-130. https://doi.org/10.1590/S1413-95962004000200008.