Kharay, S. S., A. Sharma, and P. Bansal. “Evaluation of Hybrid Problem-Based Learning in Large Classrooms: A Qualitative and Quantitative Analysis”. International Journal of Research in Medical Sciences, vol. 6, no. 11, Oct. 2018, pp. 3623-8, doi:10.18203/2320-6012.ijrms20184419.