@article{FPM_2001_7_1_a19,
     author = {L. E. Rossovskii},
     title = {Strongly elliptic difference-differential operators in semibounded cylinder},
     journal = {Fundamentalʹna\^a i prikladna\^a matematika},
     pages = {289--293},
     publisher = {mathdoc},
     volume = {7},
     number = {1},
     year = {2001},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/FPM_2001_7_1_a19/}
}