| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The Twofish Encryption Algorithm | 978-0-387-98713-2 (0-387-98713-4) | 1999 | Bruce Schneier · Chris Hall · John Kelsey · David Wagner |
| The Twofish Encryption Algorithm: A 128-Bit Block Cipher | 978-0-471-35381-2 (0-471-35381-7) | 1999 | John Kelsey · David Wagner · Niels Ferguson |