1. Scattering and Localization of Classical Waves in Random Media, edited by P. Sheng (World Scientific, Singapore, 1990).
2. B.A. van Tiggelen, in Diffuse Waves in Complex Media, edited by J.-P. Fouque, NATO Science Series C531 (Kluwer, Dordrecht, 1999).
3. B. White, P. Sheng, Z.Q. Zhang, and G. Papanicolaou, Phys. Rev. Lett. 59, 1918 (1987).
4. A. Lagendijk, J. Gómez Rivas, A. Imhof, F.J.P. Schuurmans, and R. Sprik, in this volume.
5. F. Scheffold, R. Lenke, R. Tweer, and G. Maret, Nature 398, 206 (1999); D.S. Wiersma, J. Gómez Rivas, P. Bartolini, A. Lagendijk, and R. Righini, Nature 398, 207 (1999).