Hyperbolic Geometry
Introduction to Hyperbolic Geometry
Foundations of Hyperbolic Manifolds
Logic (Introductory monographs in mathematics)
The Core of Mathematics An Introduction to Modern Mathematics
Partial differential equations Basic theory
The Non-Euclidean, Hyperbolic Plane: Its Structure and Consistency (Universitext)
Lectures on Hyperbolic Geometry
The Foundations of Geometry and the Non-Euclidean Plane