R. H., W. D. Silvia C. R., S. Kumar, M. K. Sharma, B. V. Poojary, and R. Raj, “Evaluation of academic stress among medical students using graphology and machine learning algorithm in correlation with salivary cortisol”, Int J Res Med Sci, vol. 9, no. 9, pp. 2733–2740, Aug. 2021.