Parera, H., and V. Lenda. “Evaluation of Motility, Viability and Abnormality of Boar Spermatozoa in Various Modified Extenders”. JURNAL ILMIAH PETERNAKAN TERPADU, vol. 11, no. 1, Mar. 2023, pp. 13-33, doi:10.23960/jipt.v11i1.p13-33.