@article{1029002355, author = {Hayman, W. K.}, title = {The logarithmic derivative of multivalent functions.}, journal = {Michigan Math. J.}, volume = {27}, number = {1}, year = {1980}, pages = { 149-179}, language = {en}, url = {http://dml.mathdoc.fr/item/1029002355} }
Hayman, W. K. The logarithmic derivative of multivalent functions.. Michigan Math. J., Tome 27 (1980) no. 1, pp. 149-179. http://gdmltest.u-ga.fr/item/1029002355/