@article{DAN_1968_179_1_a10,
     author = {R. A. Syunyaev},
     title = {The necessity of a neutral hydrogen period in the evolution of the {Universe}},
     journal = {Doklady Akademii Nauk},
     pages = {45--47},
     publisher = {mathdoc},
     volume = {179},
     number = {1},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1968_179_1_a10/}
}