Bhatti, Sajid Nazir, et al. “OUTCOME OF INTRAMEDULLARY SPINAL CORD TUMOURS: EXPERIENCE WITH 18 PATIENTS OPERATED AT AYUB TEACHING HOSPITAL, ABBOTTABAD”. Journal of Ayub Medical College Abbottabad, vol. 22, no. 3, Sept. 2010, pp. 15-17, https://jamc.ayubmed.edu.pk/index.php/jamc/article/view/2852.