Harminder Singh. “Efficacy of Amitriptyline Versus Propranolol for Prophylaxis of Migraine: A Comparative Study”. International Journal of Health and Clinical Research 4, no. 24 (December 31, 2021): 166–169. Accessed July 27, 2024. https://ijhcr.com/index.php/ijhcr/article/view/3789.