@article{SM_1994_79_1_a11,
     author = {S. A. Stepin},
     title = {Spectrum and completeness of natural oscillations of the~atmosphere with temperature stratification},
     journal = {Sbornik. Mathematics},
     pages = {179--190},
     publisher = {mathdoc},
     volume = {79},
     number = {1},
     year = {1994},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1994_79_1_a11/}
}