JETP, Vol. 14,
No. 3,
p. 647 (March 1962)
(Russian original - ZhETF,
Vol. 41,
No. 3,
p. 907,
March 1962
)
On an Upper Limit on the Density of Neutrinos, Gravitons, and Baryons in the Universe
Ya. B. Zel'dovich, Ya. A. Smorodinskii
Received: April 14, 1961
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