Iyanda, Ayobola, and Dapo Oparinde. “Administration of Counterfeit Sildenafil Citrate to Wistar Rats: Impact on Serum Micronutrient Levels”. International Journal of Biological Research, vol. 2, no. 2, Aug. 2014, pp. 87-89, https://doi.org/10.14419/ijbr.v2i2.3161.