Aich, T., I. Saha, D. Ram, S. Ranjan, and S. Subedi. “A Comparative Study On 136 Opioid Abusers In India and Nepal”. Journal of Psychiatrists' Association of Nepal, vol. 2, no. 2, Jan. 2014, pp. 11-17, doi:10.3126/jpan.v2i2.9719.