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@article{Shpol’skii:1963,
author = {E. V. Shpol’skii},
title = {New results on the radiation properties of optical masers (lasers)},
publisher = {Physics-Uspekhi},
year = {1963},
journal = {Phys. Usp.},
volume = {5},
number = {4},
pages = {612-615},
url = {https://ufn.ru/en/articles/1963/4/c/},
doi = {10.1070/PU1963v005n04ABEH003440}
}
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