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@article{AM2_1969__2_182307, author = {E. HILLE}, title = {Some {Properties} of the {Jordan} {Operator}}, journal = {Aequationes mathematicae}, pages = {105--110}, publisher = {mathdoc}, volume = {2}, year = {1969}, zbl = {0162.18604}, url = {http://geodesic.mathdoc.fr/item/AM2_1969__2_182307/} }
E. HILLE. Some Properties of the Jordan Operator. Aequationes mathematicae, Tome 2 (1969), pp. 105-110. http://geodesic.mathdoc.fr/item/AM2_1969__2_182307/