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@article{AM2_1973__9_136373, author = {JEROME A. GOLDSTEIN}, title = {On the {Convergence} and {Approximation} of {Cosine} {Functions} {(Short} {Communication)}}, journal = {Aequationes mathematicae}, pages = {309--309}, publisher = {mathdoc}, volume = {9}, year = {1973}, url = {http://geodesic.mathdoc.fr/item/AM2_1973__9_136373/} }
JEROME A. GOLDSTEIN. On the Convergence and Approximation of Cosine Functions (Short Communication). Aequationes mathematicae, Tome 9 (1973), p. 309. http://geodesic.mathdoc.fr/item/AM2_1973__9_136373/