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@article{MZ_1969__109_171148, author = {Derek Keith Thomas}, title = {On an {Extremal} {Problem} in {Univalent} {Functions.}}, journal = {Mathematische Zeitschrift}, pages = {344--348}, publisher = {mathdoc}, volume = {109}, year = {1969}, zbl = {0174.12201}, url = {http://geodesic.mathdoc.fr/item/MZ_1969__109_171148/} }
Derek Keith Thomas. On an Extremal Problem in Univalent Functions.. Mathematische Zeitschrift, Tome 109 (1969), pp. 344-348. http://geodesic.mathdoc.fr/item/MZ_1969__109_171148/