P, MAHESHWARI, et al. “A COMPARITIVE STUDY TO EVALUVATE THE EFFICACY OF AMLODIPINE WITH BISOPROLOL IN HYPERTENSIVE PATIENTS”. Asian Journal of Pharmaceutical and Clinical Research, vol. 7, no. 4, Sept. 2014, pp. 98-101, https://www.journals.innovareacademics.in/index.php/ajpcr/article/view/1204.