@article{DAN_1991_319_4_a3,
     author = {V. A. Vinokurov},
     title = {Logarithm of the solution of a linear differential equation, the},
     journal = {Doklady Akademii Nauk},
     pages = {792--797},
     publisher = {mathdoc},
     volume = {319},
     number = {4},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1991_319_4_a3/}
}