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@article{AM2_1971__6_136193, author = {A.B. BUCHE}, title = {On the {Cosine-Sine} {Operator} {Functional} {Equations}}, journal = {Aequationes mathematicae}, pages = {231--234}, publisher = {mathdoc}, volume = {6}, year = {1971}, zbl = {0232.47044}, url = {http://geodesic.mathdoc.fr/item/AM2_1971__6_136193/} }
A.B. BUCHE. On the Cosine-Sine Operator Functional Equations. Aequationes mathematicae, Tome 6 (1971), pp. 231-234. http://geodesic.mathdoc.fr/item/AM2_1971__6_136193/