Khan, S. A., and M. Saleem. “Special Paper Fifty Years of Pakistan Journal of Scientific and Industrial Research - An Overview With Reference to PCSIR Laboratories”. Biological Sciences - PJSIR, vol. 51, no. 4, Aug. 2008, pp. 177-84, https://v2.pjsir.org/index.php/biological-sciences/article/view/665.