Beutelspacher, A. (1994). Cryptology. The Mathematical Association of America.
Lua i Stíl Chicago (17ú heag.)Beutelspacher, Albrecht. Cryptology. Washington, D.C: The Mathematical Association of America, 1994.
Lua MLA (9ú heag.)Beutelspacher, Albrecht. Cryptology. The Mathematical Association of America, 1994.
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