[[LAFF 64]

John Laffin:

Codes and Ciphers: Secret Writing through the Ages

London, Abelard-Schuman, 1964.

[[LAYW 99]
  1. F. Laywine,

G. L. Mullen:

Discete mathematics using latin squares

John Wiley & Sons Inc. New York, Chichester,                                                Weinheim Brisbane, Singapore, Toronto, 1999.

[[DHLEH 80]

D.H. Lehmer:

A History of the Sieve Process in: J.Howlett, N.Metropolis, Gian Carlo Rota (Eds): A History of Computing in the Twentieth Century

Academic Press, Inc., 1980.  445-456

[[LEVI 77]

J.Levine, I.V.Brawley:

Some cryptographic applications of permutation polynomials

Cryptologia 1(1977) 76-92.

[[LEVI 91]

J. Levine:

United States Cryptographic patents 1861-1989.

Cryptologia Terre Haute, Indiana, 1991

[[LORENZ 85]

Konrad Lorenz:

Összehasonlító magatartás-kutatás (Az etológia alapjai)

Gondolat Kiadó, Budapest, 1985.

[[LORENZ 97]

Konrad Lorenz:

Ember voltunk hanyatlása

CARTAFILUS Kiadó, Budapest, 1997.

[[LÖFV 99]

J. Löfvenberg:

Random Codes for Digital Fingerprinting

Linköping Studies in Science and Technology.

 Thesis No 749,    Linköping, 1999.

[[LUCI 87]

Dennis Luciano:

Cryptology: From Caesar Ciphers to Public-Key Cryptosystems

College Mathematics Journal, January 1987., 2-17.