Untsa, A. T., Sutarjo, G. A., & Hakim, R. R. (2019). Simple storage of sperm cells using combination of coconut and glycerol water towards motility and viability of Koi sperm (Cyprinus carpio). IJOTA (Indonesian Journal of Tropical Aquatic), 2(1), 25–32. https://doi.org/10.22219/ijota.v2i1.7327