@article{MZ_1973__132_171921,
     author = {Ming-Chit Liu},
     title = {On the {Derivative} of {Some} {Analytic} {Functions.}},
     journal = {Mathematische Zeitschrift},
     pages = {205--208},
     publisher = {mathdoc},
     volume = {132},
     year = {1973},
     zbl = {0257.30001},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__132_171921/}
}