1. International Conference on Harmonization. Guideline for elemental impurities: Q3D. Available at: https://www.ich.org/fileadmin/Public_Web_Site/ICH_Products/Guidelines/Quality/Q3D/Q3D_Step_4.pdf. Accessed September 22, 2019.
2. Implementation of the ICH Q3D elemental impurities guideline: challenges and opportunities;Teasdale;Pharm Technol,2015
3. An elemental impurities excipient database: a viable tool for ICH Q3D drug product risk assessment;Boetzel;J Pharm Sci,2018
4. Materials in manufacturing and packaging systems as sources of elemental impurities in packaged drug products: a literature review;Jenke;PDA J Pharm Sci Technol,2015
5. Lhasa Limited. Available at: https://www.lhasalimited.org/Initiatives/Elemental-Impurities.htm. Accessed January 21, 2020.