@article{DAN_1965_162_1_a10,
     author = {V. P. Bykov},
     title = {Ray caustics and natural oscillations in open cavities},
     journal = {Doklady Akademii Nauk},
     pages = {46--49},
     publisher = {mathdoc},
     volume = {162},
     number = {1},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1965_162_1_a10/}
}