@article{DAN_1973_212_2_a2,
     author = {R. J. Grabovskaya and S. G. Krein},
     title = {On a representation of the algebra of differential operators and related differential equations},
     journal = {Doklady Akademii Nauk},
     pages = {280--283},
     publisher = {mathdoc},
     volume = {212},
     number = {2},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1973_212_2_a2/}
}