1. Drielsma J, Russell-Vaccari A, Drnek T, Brady T, Weihed P, Mistry M, Perez Simbor L (2016) Mineral resources in life cycle impact assessment—defining the path forward. Int J Life Cycle Assess 21(1):85–105
2. ILZSG (2016) Monthly bulletin of the International Lead and Zinc Study Group 56(1):42–44
3. PE INTERNATIONAL (2012) GaBi 6 dataset documentation for the software-system and databases, LBP, University of Stuttgart and PE INTERNATIONAL GmbH, Leinfelden-Echterdingen, ( http://documentation.gabi-software.com/ )
4. Santero N, Hendry J (2016) Harmonization of LCA methodologies for the metal and mining industry. Int J Life Cycle Assess. doi: 10.1007/s11367-015-1022-4
5. USEPA (1995) AP-42—compilation of air pollutant emission factors. Volume 1: stationary point and area sources. Fifth Edition. Office of Air Quality Planning and Standards. Research Triangle Park, NC