@article{IM2_1972_6_2_a7,
     author = {Yu. F. Korobeinik},
     title = {Normal solvability of linear differential equations in the complex plane},
     journal = {Izvestiya. Mathematics },
     pages = {445--466},
     publisher = {mathdoc},
     volume = {6},
     number = {2},
     year = {1972},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1972_6_2_a7/}
}