@article{DAN_1994_337_5_a12,
     author = {N. I. Ostrosablin},
     title = {Eigenoperators and eigenvectors for a system of differential},
     journal = {Doklady Akademii Nauk},
     pages = {608--610},
     year = {1994},
     volume = {337},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1994_337_5_a12/}
}