Malik, B. A., S. Zafar, A. Razzaq, M. A. Butt, M. S. Khan, and S. Mughal. “Frequently Associated Problems of Cerebral Palsy”. Annals of Punjab Medical College, Vol. 1, no. 2, July 2007, pp. 14-18, doi:10.29054/apmc/2007.638.