@article{DE_1984_20_2_a9,
     author = {A. S. Pechentsov},
     title = {Boundary value problems for differential equations, which contain a parameter, with multiple roots of the characteristic equation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {263--273},
     publisher = {mathdoc},
     volume = {20},
     number = {2},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1984_20_2_a9/}
}