Ireland, Kenneth F.
A Classical introduction to modern number theory
Springer-Verlag, 1990
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Adams, William W.
Introduction to number theory
Prentice-Hall, 1976
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Flath, Daniel E.
Introduction to number theory
John Wiley & Sons, 1989
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Davenport, Harold
Multiplicative number theory / Darold Davenport; revised by Hugh L. Montgomery
Springer-Verlag , 1980
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Cohen, Leon W.
The Structure of the real number system
D. Van Nostrand, 1963
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