@article{DAN_1974_215_4_a12,
     author = {S. S. Kalmykova},
     title = {Instability of relativistic beam in an open resonator},
     journal = {Doklady Akademii Nauk},
     pages = {814--817},
     publisher = {mathdoc},
     volume = {215},
     number = {4},
     year = {1974},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1974_215_4_a12/}
}