BEGUM, D. A. “Total Ozone Potential Vorticity and Tropopause Pressure : A Comparative Analysis over South-East Asia”. MAUSAM 52, no. 2 (April 1, 2001): 413–420. Accessed April 3, 2025. http://103.215.208.102/index.php/MAUSAM/article/view/1708.