1. Proceedings, 4th Workshop on Quantum Field Theory under the Influence of External Conditions, Leipzig, September 1998;Bordag,1999
2. The following list of references of recent years demonstrates the versatile applicability of the Casimir effect and its cousins in various areas of physics. This list is somewhat sporadic and by no means complete. Nevertheless, we hope it may be useful for some readers. We apologize in advance to authors offended due to omission of their works. Additional recent papers are listed in other bibliographical items below. In particular, note the recent extensive bibliography, containing hundreds of references, in the resource letter lambib, J. Schwinger, Proc. Natl. Acad. Sci. U.S.A. 90, 1993, 958, 2105, 4505, 7285;, 91, 1994, 6473;
3. C. Eberlein, Phys. Rev. A, 53, 1996, 2772;, Phys. Rev. Lett. 76, 1996, 3842;
4. K. A. Milton, preprint, hep-th/9811174;, K. A. Milton, and, Y. J. Ng, Phys. Rev. E, 55, 1997, 4207;, 57, 1998, 55044;