Salat, M. Y. ., . N. . Baloch, . M. . Sultana, . S. S. . Hasan, and S. N. . Ahmed. “Comparative Study Of Verapamil And Amytriptyline In Acute Opioid Abstinence Syndrome”. Journal of Bahria University Medical and Dental College, vol. 5, no. 1, Mar. 2015, pp. 32-36, https://jbumdc.bahria.edu.pk/index.php/ojs/article/view/101.