Sznitman A.-S. Brownian motion, obstacles and random media

London: Springer, 1998. — 372 p.The Feynman-Kac Formula and Semigroups.
Some Potential Theory.
Some Principal Eigenvalue Estimates.
The Method of Enlargement of Obstacles.
Lyapunov Exponents.
Quenched Path Measure and Pinning Effect.
Overview, further Results and Problems.