V. Chaudhary, D. Upadhyay, S. P. Singh, A. Singh, H. S. Joshi, and R. Katyal, “A cross sectional study to assess perceived stress and stressors associated with it among undergraduate medical students in a private medical college of Uttar Pradesh, India”, Int J Community Med Public Health, vol. 3, no. 7, pp. 1752–1758, Dec. 2016.