Delfs, H., & Knebl, H. [ca. 2002]. Introduction to cryptography : principles and applications. In Information security and cryptography [Book]. Berlin [u.a.]: Springer.

DELFS, Hans und KNEBL, Helmut, 2002. Introduction to cryptography : principles and applications. Berlin [u.a.]: Springer. ISBN 3540422781.

Delfs, H., und H. Knebl. „Introduction to cryptography : principles and applications“. Information security and cryptography, book, Springer, 2002.

Delfs, Hans/Knebl, Helmut: Introduction to cryptography : principles and applications, Berlin [u.a.] 2002.

Delfs, H. und Knebl, H. (2002), Introduction to cryptography : principles and applications, Information security and cryptography, Bd. , Springer, Berlin [u.a.].