Q. T. Islam, M. R. Siddiqui, E. Mustafa, A. Hossain, M. Y. U. Rahman, and H. Sina, “Legg-Calve-Perthes Disease: A Rare Cause of Bilateral Avascular Necrosis of the Hip Joints”, Anwer Khan Mod Med Coll J, vol. 4, no. 1, pp. 40–41, Feb. 2013.