@article{IM2_1978_12_2_a5,
     author = {G. A. Kalyabin},
     title = {Trace spaces for generalized anisotropic {Liouville} classes},
     journal = {Izvestiya. Mathematics},
     pages = {289--297},
     year = {1978},
     volume = {12},
     number = {2},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1978_12_2_a5/}
}