| author: | Sachs, R.K. and Wolfe, A.M. |
| title: | "Perturbations of a Cosmological Model and Angular Variations of the Microwave Background" |
| doi: | |
| format: | |
| volume: | 147 |
| year: | 1967 |
| pages: | 73–90 |
| journal: | Astrophys. J. |
| record URL: | http://relativity.livingreviews.org/refdb/record/2432 |
| lrr-1998-9 |
|