@article{SM_1989_63_1_a7,
     author = {A. A. Shkalikov},
     title = {Strongly damped pencils of operators and solvability of the corresponding operator-differential equations},
     journal = {Sbornik. Mathematics},
     pages = {97--119},
     publisher = {mathdoc},
     volume = {63},
     number = {1},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1989_63_1_a7/}
}