@article{10_4064_ap_28_3_297_326,
     author = {W. Janowski},
     title = {Some extremal problems for certain families of analytic functions {I}},
     journal = {Annales Polonici Mathematici},
     pages = {297--326},
     publisher = {mathdoc},
     volume = {28},
     number = {3},
     year = {1973},
     doi = {10.4064/ap-28-3-297-326},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-28-3-297-326/}
}