9. ISBN 0-88385-504-6.↑ Leighton, Albert C. (1969). "Secret Communication among the Greeks and Romans". Technology and Culture. 10 (2): 139–154. doi:10.2307/3101474. JSTOR 3101474. {{cite journal}}: Unknown parameter |month= ignored (help)↑ Sinkov, Abraham (1966). Elementary Cryptanalysis: A Mathematical Approach. Mathematical Association of America. pp. 13–15. ISBN 0-88385-622-0. {{cite book}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)↑ Singh, Simon (2000). The Code Book. Anchor. pp. 72–77. ISBN 0-385-49532-3.↑ Savarese, Chris (2002-07-15). "The Caesar Cipher". සම්ප්‍රවේශය 2008-07-16. {{cite web}}: Unknown parameter |coauthors= ignored (|author= suggested) (help)↑ Wobst, Reinhard (2001). Cryptology Unlocked. Wiley. p. 31. ISBN 978-0-470-06064-3.ග්‍රන්ථ නාමාවලිය[සංස්කරණය]David Kahn, The Codebreakers — The Story of Secret Writing, 1967. ISBN 0-684-83130-9.F.L. Bauer, Decrypted Secrets, 2nd edition, 2000, Springer. ISBN 3-540-66871-3.Chris Savarese