Salman, S., M. Ismail, M. Anees, S. badshah, Z. Nazar, and N. R. Awan. “Substance Abuse in Patients With Co-Morbid ADHD”. Journal of Pakistan Psychiatric Society, Vol. 9, no. 02, Dec. 2012, pp. 91-96, https://jpps.pk/index.php/journal/article/view/895.