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@article{MZ_1975__144_172248, author = {Peter Lappan}, title = {A {p-Valent} {Function} with a {Non-Normal} {Derivative.}}, journal = {Mathematische Zeitschrift}, pages = {147--148}, publisher = {mathdoc}, volume = {144}, year = {1975}, zbl = {0307.30032}, url = {http://geodesic.mathdoc.fr/item/MZ_1975__144_172248/} }
Peter Lappan. A p-Valent Function with a Non-Normal Derivative.. Mathematische Zeitschrift, Tome 144 (1975), pp. 147-148. http://geodesic.mathdoc.fr/item/MZ_1975__144_172248/