N. Anwer, S. Ahmed, J. Aslam, S. Ishaq, and H. M. Samama Amjad, “TO COMPARE THE EFFECT OF BRISK WALK AND STAIR CLIMBING ON CARDIOPULMONARY ENDURANCE IN UNIVERSITY STUDENTS”, PBMJ, vol. 5, no. 1, pp. 216–220, Jan. 2022, doi: 10.54393/pbmj.v5i1.215.