1. Muehlbauer Technologies - https://www.muehlbauer.de/products/epassport/epassport-personalization-issuance/inkjet-laser-personalization/(accessed 14 March 2023).
2. Ruhlamat - https://www.ruhlamat.com/en/card-systems-and-passport-systems/passport-personalisation-systems (accessed 14 March 2023).
3. Unomatic Corporation - https://www.unomatic.com/security-system/passport-production-solution/laser-perforation-system/(accessed 14 March 2023).
4. EMPEROR Technology - https://www.emperortech.com/products/secure-identity.html (accessed 14 March 2023).
5. International Civil Aviation Organization. 2015. Doc 9303, Machine Readable Travel Documents Part 3 — Specifications Common to all MRTDs.