@article{GDZPPN002350777, title = {Some Extremal Problems for Functions Univalent in an Annulus.}, journal = {Mathematica Scandinavica}, volume = {28}, year = {1971}, pages = {129-138}, zbl = {0222.30013}, url = {http://dml.mathdoc.fr/item/GDZPPN002350777} }
McLaughlin, Renate. Some Extremal Problems for Functions Univalent in an Annulus.. Mathematica Scandinavica, Tome 28 (1971) pp. 129-138. http://gdmltest.u-ga.fr/item/GDZPPN002350777/