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@article{AM2_1985__29_137075, author = {Konrad D. Heuvers}, title = {A family of symmetric biadditive nonbilinear functions.}, journal = {Aequationes mathematicae}, pages = {14--18}, publisher = {mathdoc}, volume = {29}, year = {1985}, zbl = {0596.15026}, url = {http://geodesic.mathdoc.fr/item/AM2_1985__29_137075/} }
Konrad D. Heuvers. A family of symmetric biadditive nonbilinear functions.. Aequationes mathematicae, Tome 29 (1985), pp. 14-18. http://geodesic.mathdoc.fr/item/AM2_1985__29_137075/