1. Available from: http://www.ruag.com/en/Ammotec/Defence_and_Law_Enforcement/9x19.
2. Available from: http://www.men-defencetec.de/en/produkte/polizei/9-mm-x-19-9-mm-luger.
3. ASTM E 1588–08 Standard Guide for Gunshot Residue Analysis by Scanning Electron Microscopy/Energy Dispersive X-ray Spectrometry.
4. Method for the determination of shooting distance;Lichtenberg;Forensic Sci Rev,1990
5. Experiences with zincon, a useful reagent for the determination of firing range with respect to leadfree ammunition;Beijer;J Forensic Sci,1994