1. Aghanim, N., De Luca, A., Bouchet, F.R., Gispert, G. & Puget, J.L., 1997, A&A, 325, 9.
2. Aghanim, N., Désert, F.X., Puget, J.L. & Gispert, R., 1996, A&A, 311,1; see also erratum to appear in A&A, preprint astro-ph/9811054.
3. Albrecht, A. & Steinhardt, P.J., 1982, PhRvL, 48, 1220.
4. Alpher, R.A. & Herman, R.C., 1948, Natur, 162, 774.
5. Avelino, P.P., Caldwell, R.R. & Martins, C.J.A.P., 1998, preprint astro-ph/9809130.