@article{SM_1987_58_2_a14,
     author = {V. M. Millionshchikov},
     title = {Central exponents of linear systems of differential equations},
     journal = {Sbornik. Mathematics},
     pages = {541--555},
     publisher = {mathdoc},
     volume = {58},
     number = {2},
     year = {1987},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1987_58_2_a14/}
}