@article{RM_1965_20_3_a25,
     author = {I. S. Lyubchenko},
     title = {Sufficient conditions for the existence and uniqueness of solution of a boundary-value problem for a~system of linear partial differential equations involving a~small parameter in the higher derivative term},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {20},
     number = {3},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1965_20_3_a25/}
}