1. Ellis, G. F. R., and Madsen, M. S. (1991).Class. Quant. Grav. 8, 667.
2. Synge, J. L. (1955).Relativity: the General Theory (North-Holland, Amsterdam).
3. Goetz, G. (1990).J. Math. Phys. 31, 2683.
4. Goetz, G., and Noetzold, D. (1989). ?An Exact Solution for a Thick Domain Wall in General Relativity?, Fermilab-Pub-89/235-A.
5. Noetzold, D. (1990). ?Scalar Field Configurations with Planar and Cylindrical Symmetry: Thick Domain Walls and Strings?, Fermilab-Pub-90/35-A.