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@article{DAN_1987_295_6_a6, author = {Nguyen Thi Thien Hoa}, title = {Rolle's theorem for differential operators, and some extremal}, journal = {Doklady Akademii Nauk}, pages = {1313--1318}, publisher = {mathdoc}, volume = {295}, number = {6}, year = {1987}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1987_295_6_a6/} }
Nguyen Thi Thien Hoa. Rolle's theorem for differential operators, and some extremal. Doklady Akademii Nauk, Tome 295 (1987) no. 6, pp. 1313-1318. http://geodesic.mathdoc.fr/item/DAN_1987_295_6_a6/