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@article{AM2_1977__15_136646, author = {Roman Ger}, title = {On an alternative functional equation.}, journal = {Aequationes mathematicae}, pages = {145--162}, publisher = {mathdoc}, volume = {15}, year = {1977}, zbl = {0361.39005}, url = {http://geodesic.mathdoc.fr/item/AM2_1977__15_136646/} }
Roman Ger. On an alternative functional equation.. Aequationes mathematicae, Tome 15 (1977), pp. 145-162. http://geodesic.mathdoc.fr/item/AM2_1977__15_136646/