“Physical Characteristics, Inorganic Constituents and Trace Metals Determination in the Street-Vended Samples of Heroin” (2006) Biological Sciences - PJSIR, 49(4), pp. 251–255. Available at: https://www.v2.pjsir.org/index.php/biological-sciences/article/view/1185 (Accessed: 10 March 2026).