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@article{MZ_1971__119_171481, author = {A.J. Lohwater}, title = {The {Boundary} {Behaviour} of {Derivatives} of {Univalent} {Functions.}}, journal = {Mathematische Zeitschrift}, pages = {115--120}, publisher = {mathdoc}, volume = {119}, year = {1971}, zbl = {0196.09201}, url = {http://geodesic.mathdoc.fr/item/MZ_1971__119_171481/} }
A.J. Lohwater. The Boundary Behaviour of Derivatives of Univalent Functions.. Mathematische Zeitschrift, Tome 119 (1971), pp. 115-120. http://geodesic.mathdoc.fr/item/MZ_1971__119_171481/