@article{DAN_1990_310_2_a21,
     author = {N. F. Shul'ga},
     title = {Emission of radiation under condition of multi-valuedness of the deflection function
},
     journal = {Doklady Akademii Nauk},
     pages = {348--350},
     publisher = {mathdoc},
     volume = {310},
     number = {2},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_310_2_a21/}
}