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@article{DE_1980_16_5_a5, author = {V. S. Vladimirov and V. V. Zharinov}, title = {Closed forms associated with linear differential operators}, journal = {Differencialʹnye uravneni\^a}, pages = {845--867}, publisher = {mathdoc}, volume = {16}, number = {5}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1980_16_5_a5/} }
V. S. Vladimirov; V. V. Zharinov. Closed forms associated with linear differential operators. Differencialʹnye uravneniâ, Tome 16 (1980) no. 5, pp. 845-867. http://geodesic.mathdoc.fr/item/DE_1980_16_5_a5/