@article{AM2_1972__8_136290,
     author = {G.J. Butler and H.I. Freedman},
     title = {Further {Critical} {Cases} of the {Scalar} {Implicit} {Function} {Theorem.}},
     journal = {Aequationes mathematicae},
     pages = {203--211},
     publisher = {mathdoc},
     volume = {8},
     year = {1972},
     zbl = {0247.26011},
     url = {http://geodesic.mathdoc.fr/item/AM2_1972__8_136290/}
}