@article{10_4064_ap_34_2_201_220,
     author = {Jadwiga Piotrowska},
     title = {Extremal problems in some classes of univalent functions in a half-plane},
     journal = {Annales Polonici Mathematici},
     pages = {201--220},
     publisher = {mathdoc},
     volume = {34},
     number = {2},
     year = {1977},
     doi = {10.4064/ap-34-2-201-220},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-34-2-201-220/}
}