Y. I. Tayem, H. James, K. A. J. Al-Khaja, R. L. A. Razzak, B. K. Potu, and R. P. Sequeira, “Medical Students’ Perceptions of Peer Assessment in a Problem-based Learning Curriculum”, Sultan Qaboos Univ Med J, vol. 15, no. 3, pp. 376–381, Aug. 2015.