S. Mughniati, D. K. Sari, D. Rendrawan, and L. Rahim, “Effects of Kapok Seed Extract(Ceiba pentandra Gaertn) as Contraceptive Agent to the Quality of the Spermatozoa in Domestic Cat (Felis domestica)”, J. Riset Vet. Ind., vol. 2, no. 1, Jan. 2018.