olemuse-identiteetide loomise ja kasutamise korraldusülevaateidhttps://ntouk.files.wordpress.com/2015/05/eid-identity-management-in-an-online-world-paper.pdfhttps://nvvb.nl/media/cms_page_media/758/13%20Mari%20Pedak%20eID%20Estonian%20experience.pdf