Sultana, S., S. Begum, and S. Ferdousi. “Effect of Losartan and Atenolol on Heart Rate Variability in Newly Diagnosed Essential Hypertensive Patient”. Bangabandhu Sheikh Mujib Medical University Journal, vol. 6, no. 2, Aug. 2016, pp. 161-7, doi:10.3329/bsmmuj.v6i2.29135.