Links
http://numberworld.blogspot.com/2017/03/kryptos-cipher-part-1.html
http://www.thekryptosproject.com/
http://scirealm.org/Kryptos.html
https://kryptosfan.wordpress.com/
http://kryptools.com/hints.htm
http://kryptos.yak.net/
https://kryptos.arcticus.com/
http://www.voynich.net/Kryptos/
http://cryptocrap.blogspot.com/2011/07/kryptos.html
https://elonka.com/kryptos/
http://jimsanborn.net/
https://en.wikipedia.org/wiki/Kryptos
http://rumkin.com/tools/cipher/vigenere-keyed.php
http://scienceblogs.de/klausis-krypto-kolumne/tag/kryptos/
https://www.youtube.com/watch?v=25YFYKKKkDo
https://www.wired.com/2014/11/second-kryptos-clue/
https://www.nsa.gov/news-features/declassified-documents/cia-kryptos-sculpture/
https://tecsec.com/meet-the-team/
https://math.ucsd.edu/~crypto/Projects/KarlWang/index2.html
https://www.youtube.com/watch?v=1j_k3JZa7u0
https://www.youtube.com/watch?v=b02nHGwTKPk
http://kryptos.fea.st
Michael´s "BREAKIN GERMAN NAVY CIPHERS" website