@article{IVM_1981_3_a11,
     author = {I. K. Karasaev},
     title = {A~method of determining the characteristic indices of linear homogeneous differential equations with periodic coefficients},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {73--75},
     publisher = {mathdoc},
     number = {3},
     year = {1981},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1981_3_a11/}
}