1. Bertschinger, E., 1996, in: R. Schaeffer et al. (Eds.), Cosmology and Large-scale Structure, Les Houches session LX, Elsevier, Amsterdam, p. 273.
2. Dicke, R.H., Peebles, P.J.E., Rolls, P.G., & Wilkinson, D.T., 1965, ApJ, 142, 414.
3. Durrer, R., 1999, these Proceedings, NewAR, 43, 111.
4. Efstathiou, G., 1996, in: R. Schaeffer et al. (Eds.), Cosmology and Large-scale Structure, Les Houches session LX, Elsevier, Amsterdam, p.133.
5. Misner, C.W., Thorne, K.S., & Wheeler, J.A., 1970, Gravitation, Freeman, New York, NY.