1. Government of Canada. https://www.canada.ca/en/shared-services/corporate/transparency/briefing-documents/ministerial-briefing-book/delegation.html
2. PGP. https://www.openpgp.org
3. The University of Iowa. https://opsmanual.uiowa.edu/administrative-financial-and-facilities-policies/facsimile-signatures-and-signature-assignment-2
4. Viafirma. https://www.viafirma.com/blog-xnoccio/en/signature-delegation/
5. WhatsApp. https://www.whatsapp.com