@article{MAN_1974__211_162646,
     author = {Heinrich Steinlein},
     title = {An {Approximation} {Method} in {Asymptotic} {Fixed} {Point} {Theory.}},
     journal = {Mathematische Annalen},
     pages = {199--218},
     publisher = {mathdoc},
     volume = {211},
     year = {1974},
     zbl = {0275.47040},
     url = {http://geodesic.mathdoc.fr/item/MAN_1974__211_162646/}
}