@article{DAN_1964_158_4_a19,
     author = {V. K. Konyukhov and L. A. Kulevskii and A. M. Prokhorov and A. K. Sokolov},
     title = {The spectrum of a ruby optical generator with external spherical mirrors},
     journal = {Doklady Akademii Nauk},
     pages = {824--826},
     publisher = {mathdoc},
     volume = {158},
     number = {4},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1964_158_4_a19/}
}