Enoluomen Ehigiator, B., and E. Adikwu. “Toxicity Study of Ethanolic Stem Bark Extract of Xylopia Aethiopica on Fertility Indexes in Male Rats: An Experimental Study”. International Journal of Reproductive BioMedicine (IJRM), Vol. 13, no. 4, May 2020, pp. 265–274, doi:10.18502/ijrm.v13i4.6889.