@article{VNGU_2014_14_4_a6,
     author = {E. Yu. Romanova},
     title = {Spectral {Analysis} of {Differential} {Operator} with {Involution}},
     journal = {Sibirskij \v{z}urnal \v{c}istoj i prikladnoj matematiki},
     pages = {64--78},
     publisher = {mathdoc},
     volume = {14},
     number = {4},
     year = {2014},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VNGU_2014_14_4_a6/}
}