@article{DAN_1966_168_3_a17,
     author = {N. G. Basov and V. N. Morozov and A. N. Oraevsky},
     title = {A contribution to the theory of undamped pulsations of quantum generators},
     journal = {Doklady Akademii Nauk},
     pages = {550--553},
     publisher = {mathdoc},
     volume = {168},
     number = {3},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_168_3_a17/}
}