Problem book in the theory of functions

Theory and Application of Infinite Series

Elements of the Theory of Functions

Theory of functions

Problem Book in the Theory of Functions, Volume II (Problems in the Advanced Theory of Functions)

Elements of the theory of functions

Theory of Functions, Parts I and II

Infinite Sequences and Series

Theorie und Anwendung der unendlichen Reihen

Theory of Functions, Part 2

Grundlagen der allgemeinen Theorie der analytischen Funktionen