@article{IVM_1998_9_a0,
     author = {V. N. Bobochko},
     title = {Unstable and multiple elements of the spectrum in a~system of singularly perturbed differential equations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--13},
     year = {1998},
     number = {9},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1998_9_a0/}
}