Eniola Kadir, Risikat, et al. “Low Dose Bitter Leaf Improves Sperm Quality Disrupted in Immunosuppressed Wistar Rats: An Experimental Study”. International Journal of Reproductive BioMedicine (IJRM), vol. 18, no. 3, Apr. 2020, pp. 215-26, doi:10.18502/ijrm.v18i3.6720.