Untsa, A.T., Sutarjo, G.A. and 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 (Feb. 2019), 25–32. DOI:https://doi.org/10.22219/ijota.v2i1.7327.