Sianturi, Pertin, Amir Syarifuddin, and Bistok Saing. “Incidence of Epilepsy Among Patients With Cerebral Palsy (CP) in Yayasan Pemeliharaan Anak Cacat (YPAC) – Medan”. Medical Journal of Indonesia 11, no. 3 (August 1, 2002): 158-63. Accessed December 6, 2019. http://mji.ui.ac.id/journal/index.php/mji/article/view/69.