@article{FAA_1990_24_4_a15,
     author = {S. A. Stepin},
     title = {Spectral analysis of a singular boundary-value problem modeling the vibrations of the atmosphere},
     journal = {Funkcionalʹnyj analiz i ego prilo\v{z}eni\^a},
     pages = {90--91},
     publisher = {mathdoc},
     volume = {24},
     number = {4},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FAA_1990_24_4_a15/}
}