Bajpai , R, et al. “Effect of Bhramari Pranayama and Yoganidra on Cardiovascular Hyper-Reactivity to Cold Presser Test”. International Journal of Medical Science Research and Practice, vol. 2, no. 1, Mar. 2015, pp. 24-26, https://ijmsrp.isroset.org/index.php/j/article/view/30.