@article{LJM_2005_17_a0,
     author = {F. G. Avkhadiev and K.-J. Wirths},
     title = {Concave schlicht functions with bounded opening angle at infinity},
     journal = {Lobachevskii journal of mathematics},
     pages = {3--10},
     year = {2005},
     volume = {17},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/LJM_2005_17_a0/}
}