Pólya,George and Szegő, Gábor Problems and theorems in analysis : Volume II,. Theory of functions, zeros, polynomials determinants, number theory, geometry /by George Pólya and Gábor Szegő - Berlin Springer-Verlag 1971 - xi, 391p. ISBN: 3-540-63686-2 Dewey Class. No.: 515 / POL/P