@article{DAN_1967_177_3_a17,
     author = {S. G. Zeiger},
     title = {The possibility of unidirectional oscillation in a gaseous travelling wave laser},
     journal = {Doklady Akademii Nauk},
     pages = {554--556},
     publisher = {mathdoc},
     volume = {177},
     number = {3},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1967_177_3_a17/}
}