Qaisrani, Abdul Rehman, et al. “COMPARISON OF KI-67 MIB-1 LABELLING INDEX AND HISTOPATHOLOGICAL GRADING OF ASTROCYTOMA”. Pakistan Journal of Physiology, vol. 13, no. 2, June 2017, pp. 19-21, https://pjp.pps.org.pk/index.php/PJP/article/view/45.