@article{RM_1964_19_3_a1,
     author = {M. S. Agranovich and M. I. Vishik},
     title = {Elliptic problems with a~parameter and parabolic problems of general type},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {53--157},
     publisher = {mathdoc},
     volume = {19},
     number = {3},
     year = {1964},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1964_19_3_a1/}
}