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@article{AM2_1968__1_135994, author = {W. Benz and S. Elliger}, title = {\"Uber die {Funktionalgleichung} f (1 + x) + f (1 + f (x)) = 1. {(Short} {Communication).}}, journal = {Aequationes mathematicae}, pages = {316--317}, publisher = {mathdoc}, volume = {1}, year = {1968}, zbl = {0165.17201}, url = {http://geodesic.mathdoc.fr/item/AM2_1968__1_135994/} }
W. Benz; S. Elliger. Über die Funktionalgleichung f (1 + x) + f (1 + f (x)) = 1. (Short Communication).. Aequationes mathematicae, Tome 1 (1968), pp. 316-317. http://geodesic.mathdoc.fr/item/AM2_1968__1_135994/