@article{10_4064_ap_23_2_159_177,
     author = {W. Janowski},
     title = {Extremal problems for a family of functions with positive real part and for some related families},
     journal = {Annales Polonici Mathematici},
     pages = {159--177},
     publisher = {mathdoc},
     volume = {23},
     number = {2},
     year = {1970},
     doi = {10.4064/ap-23-2-159-177},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-23-2-159-177/}
}