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@article{SF_1991__42_3_135084, author = {A. Favini}, title = {Parabolicity of second order differential equations in {Hubert} space.}, journal = {Semigroup forum}, pages = {303--312}, publisher = {mathdoc}, volume = {42}, number = {3}, year = {1991}, zbl = {0743.47038}, url = {http://geodesic.mathdoc.fr/item/SF_1991__42_3_135084/} }
A. Favini. Parabolicity of second order differential equations in Hubert space.. Semigroup forum, Tome 42 (1991) no. 3, pp. 303-312. http://geodesic.mathdoc.fr/item/SF_1991__42_3_135084/