Hardy, G.H. An introduction to the theory of numbers \ G.H. Hardy , E.M. Wright - 5th ed - Oxford : Oxford University Press , 1979 . - vii,426p - Oxford science publications . ISSN: 0198531710 Subjects--Topical Terms: ArethmeticMathematics Subjects--Index Terms: Number theory Quadratic fields Dewey Class. No.: 512.7