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2. P.J.E. Peebles, Principles of Physical Cosmology (Princeton University Press, Princeton, 1993)
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4. Ya.B. Zeldovich, A & A 5, 84 (1970)
5. A.G. Doroshkevich, V.N. Lukash, I.D. Novikov, JETP 64, 1457 (1973)