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@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/} }
I. I. Golichev. The splitting principle for nonselfadjoint partial differential operators. Differencialʹnye uravneniâ, Tome 7 (1971) no. 10, pp. 1835-1844. http://geodesic.mathdoc.fr/item/DE_1971_7_10_a9/