@article{MZ_1943__49_169037,
     author = {U.T. B\"odewadt},
     title = {Zur {Iteration} reeller {Funktionen}},
     journal = {Mathematische Zeitschrift},
     pages = {497--516},
     publisher = {mathdoc},
     volume = {49},
     year = {1943},
     zbl = {0028.35103},
     url = {http://geodesic.mathdoc.fr/item/MZ_1943__49_169037/}
}