@article{MMO_1968_18_a8,
     author = {V. M. Million\v{s}\v{c}ikov},
     title = {On the spectral theory of nonautonomous linear systems of differential equations},
     journal = {Trudy Moskovskogo matemati\v{c}eskogo ob\^{s}estva},
     pages = {147--186},
     publisher = {mathdoc},
     volume = {18},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MMO_1968_18_a8/}
}