Relativistic (Subscribe)
Links
Relativistic Quantum Mechanics
http://walterpfeifer.ch/relqm/
An electronic textbook by Walter Pfeifer that can be ordered free.
Publications in Physics and Mathematics by Walter Pfeifer
A textbook for relativistic quantum mechanics with detailed description of the Dirac equation and other publications.
An Introduction to the Lorentz-Dirac Equation
http://arxiv.org/abs/gr-qc/9912045
Notes by Eric Poisson providing two derivations of the Lorentz--Dirac equation.