@article{GDZPPN002026252,
title = {On a Functional Equation Related to Iteration.},
journal = {Aequationes mathematicae},
volume = {8},
year = {1972},
pages = {109-112},
zbl = {0256.39003},
url = {http://dml.mathdoc.fr/item/GDZPPN002026252}
}
Lamperti, John; O'Brien, George. On a Functional Equation Related to Iteration.. Aequationes mathematicae, Tome 8 (1972) pp. 109-112. http://gdmltest.u-ga.fr/item/GDZPPN002026252/