@article{MMO_1990_53_a7,
     author = {Ya. A. Roǐtberg and V. Serdiuk},
     title = {Theory of solvability in generalized functions for elliptic problems with a~parameter, for general systems of equations},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {229--258},
     publisher = {mathdoc},
     volume = {53},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1990_53_a7/}
}