@article{SM_1973_21_3_a4,
     author = {N. N. Frolov},
     title = {On~the {Dirichlet} problem for an elliptic operator in a~cylindrical domain of {Hilbert} space},
     journal = {Sbornik. Mathematics},
     pages = {423--438},
     year = {1973},
     volume = {21},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1973_21_3_a4/}
}