Mathematical Olympiads 1998 -1999: Problems and Solutions from Around the World
International Mathematics Tournament Of The Towns. Book 5: 1997-2002
Inequalities
Contests in Higher Mathematics: Miklós Schweitzer Competitions 1962–1991
Problems and Solutions for Complex Analysis
Asymptotic Methods in the Theory of Stochastic Differential Equations
Studies in Logic and the Foundations of Mathematics. Volume 145
Schaum's Outline of Group Theory
Second-Order Sturm-Liouville Difference Equations and Orthogonal Polynomials
Ordinary Differential Equations
The USSR Olympiad Problem Book: Selected Problems and Theorems of Elementary Mathematics
