Alawad, Awad, et al. “Serum Prostate-Specific Antigen As a Predictor of Prostate Volume in Sudanese Patients With Benign Prostatic Hyperplasia”. International Journal of Medicine, vol. 2, no. 1, May 2014, pp. 40-42, https://doi.org/10.14419/ijm.v2i1.2494.