M. G. H. Shafiq, “HIGH ALTITUDE HEADACHE – AN ETIOLOGICAL BASED STUDY: High Altitude Headache”, Pak Armed Forces Med J, vol. 62, no. 2, pp. 301–3, Jun. 2012, Accessed: Feb. 18, 2025. [Online]. Available: https://pafmj.org/PAFMJ/article/view/1765