@article{GDZPPN002026465, title = {On Functions Defined by Iterations of Each Other.}, journal = {Aequationes mathematicae}, volume = {8}, year = {1972}, pages = {238-241}, zbl = {0257.39002}, url = {http://dml.mathdoc.fr/item/GDZPPN002026465} }
Becker, J.D.; Ordman, E.T. On Functions Defined by Iterations of Each Other.. Aequationes mathematicae, Tome 8 (1972) pp. 238-241. http://gdmltest.u-ga.fr/item/GDZPPN002026465/