[GAIN 56]	Helen Fouché‚ Gaines:	Cryptanalysis: A Study of Ciphers and Their Solution New York, Dover Publications, 1956.
[GALL ]	Joseph S.Galland:	Bibliography of the Literature of Cryptology Laguna Hills, Aegean Park Press, n.d.
[GARD 77]	M.Gardner:	Mathematical Games A new kind of cipher that would take millions of years to break Scientific American, August 1977. 120-124
[GHOSH 01]	Anup K. Ghosh:	Security and Privacy for e-business printed in the USA, 2001.
[GOLO 82]	S. W. Golomb:	Shift Register sequences Aegean Park Press, 1982.
[GOLO 96]	S. W. Golomb:	On Factoring Jevon’s number. Cryptologia XX(1996)/243-244
[GREEN 98]	Susan A.Greenfield:	Utazás az agy körül Kulturtrade Kiadó, Budapest, 1998.