@article{DE_1971_7_10_a9,
     author = {I. I. Golichev},
     title = {The splitting principle for nonselfadjoint partial differential operators},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1835--1844},
     publisher = {mathdoc},
     volume = {7},
     number = {10},
     year = {1971},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1971_7_10_a9/}
}