T. U. Khan, N. N. Memon, A. Riaz, Z. A. Khan, S. M. Haroon, and K. A. Khan, “Serum free testosterone levels in polycystic ovarian syndrome patients and its correlation with clinical hyperandrogenism in Pakistan”, J Fatima Jinnah Med Univ, vol. 14, no. 03, pp. 132–135, Dec. 2020.