@article{VMP_2007_8_4_a3,
     author = {E. A. Polyakov and P. N. Vorontsov-Velyaminov},
     title = {A quantum gas in an external field at finite temperatures. {An} exact expression for density and exited states},
     journal = {Numerical methods and programming},
     pages = {334--351},
     publisher = {mathdoc},
     volume = {8},
     number = {4},
     year = {2007},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMP_2007_8_4_a3/}
}