@article{DE_1982_18_8_a22,
     author = {M. V. Kozhero},
     title = {Normal bases of solutions of multidimensional linear differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1460--1463},
     publisher = {mathdoc},
     volume = {18},
     number = {8},
     year = {1982},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1982_18_8_a22/}
}