Khadka, R., B. Paudel, V. Sharma, S. Kumar, and N. Bhattacharya. “Effect of Yoga on Cardiovascular Autonomic Reactivity in Essential Hypertensive Patients”. Health Renaissance, vol. 8, no. 2, Mar. 2011, pp. 102-9, doi:10.3126/hren.v8i2.4421.