Lectures on Gravitational Lensing
http://arxiv.org/abs/astro-ph/9606001Lecture notes by Ramesh Narayan (Harvard-Smithsonian Center for Astrophysics) and Matthias Bartelmann (Max Planck Institute for Astronomy) about the basic concepts and applications of gravitational lensing.
Submitted in section: Physics: Relativity: Gravitational Lensing: Lectures on Gravitational Lensing