@article{1183494381, author = {Whyburn, W. M.}, title = {A set of cyclicly related functional equations}, journal = {Bull. Amer. Math. Soc.}, volume = {36}, number = {11}, year = {1930}, pages = { 863-868}, language = {en}, url = {http://dml.mathdoc.fr/item/1183494381} }
Whyburn, W. M. A set of cyclicly related functional equations. Bull. Amer. Math. Soc., Tome 36 (1930) no. 11, pp. 863-868. http://gdmltest.u-ga.fr/item/1183494381/