@article{DAN_1966_166_4_a4,
     author = {Yu. I. Lyubich},
     title = {Investigating the deficiency of the abstract {Cauchy} problem},
     journal = {Doklady Akademii Nauk},
     pages = {783--786},
     publisher = {mathdoc},
     volume = {166},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1966_166_4_a4/}
}