Libya, Aisha Dugani. “Potentiation of the Gastroprotective Effect of Ranitidine by Verapamil in Ethanol Induced Ulcer in Rats”. International Journal of Pharmaceutical & Biological Archive 4, no. 4 (January 2, 2014). Accessed June 18, 2025. http://mail.ijpba.info/index.php/ijpba/article/view/1094.