Mathematical Discovery on Understanding, Learning and Teaching Problem Solving, Volumes I and II Polya George Heftet / 1981 / Engelsk
Problems and Theorems in Analysis II Theory of Functions. Zeros. Polynomials. Determinants. Number Theory. Geometry Polya George Heftet / 1997 / Engelsk
Problems and Theorems in Analysis I Series. Integral Calculus. Theory of Functions Polya George Heftet / 1997 / Engelsk
