Sultana, Shamima, Shelina Begum, Sultana Ferdousi, and Mohammad Nesar Uddin Ahmed. 2014. “Effect of Losartan and Amlodipine on Heart Rate Variability In Essential Hypertensive Patients”. Journal of Bangladesh Society of Physiologist 8 (2):42-50. https://doi.org/10.3329/jbsp.v8i2.18653.