SINGH, MAHAK, et al. “Effect of sow’s Parity and Semen Storage Time on Reproductive Performance of Pig After Artificial Insemination With Liquid Boar Semen”. The Indian Journal of Animal Sciences, vol. 91, no. 12, Jan. 2022, pp. 1027–1030, https://doi.org/10.56093/ijans.v91i12.119816.