Hayat, Z., N. ul Iman, I. A. Shah, N. ul Haq, S. Mehmood, Z. ., T. Nishter, S. M. Khan, and A. Rashid. “Polycythemia Rubra Vera”. Journal of Postgraduate Medical Institute, vol. 10, no. 1, Aug. 2011, https://jpmi.org.pk/index.php/jpmi/article/view/516.