@article{IVM_1970_5_a10,
     author = {A. I. Perov and V. G. Zadorozhniy},
     title = {Multidimensional linear differential equations with periodic coefficients},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {64--73},
     publisher = {mathdoc},
     number = {5},
     year = {1970},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1970_5_a10/}
}