Niven I., Zuckerman H.S., Montgomery H.L. An Introduction to the Theory of Numbers

John Wiley & Sons, 1991. — 541 pages. ISBN: 0471625469The Fifth Edition of one of the standard works on number theory, written by internationally-recognized mathematicians. Chapters are relatively self-contained for greater flexibility. New features include expanded treatment of the binomial theorem, techniques of numerical calculation and a section on public key cryptography. Contains an outstanding set of problems.