@article{DE_1969_5_6_a2,
     author = {I. I. Starun and N. I. Shkil'},
     title = {Construction of an asymptotic solution of a system of linear differential equations with slowly varying coefficients in the case of multiple elementary divisors},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1002--1009},
     publisher = {mathdoc},
     volume = {5},
     number = {6},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1969_5_6_a2/}
}