@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/