@article{AM2_1987__32_137192,
     author = {G\"unther H. Mehring},
     title = {Der {Hauptsatz} \"uber {Iteration} im {Ring} der formalen {Potenzreihen.}},
     journal = {Aequationes mathematicae},
     pages = {274--296},
     publisher = {mathdoc},
     volume = {32},
     year = {1987},
     zbl = {0627.39005},
     url = {http://geodesic.mathdoc.fr/item/AM2_1987__32_137192/}
}