@article{10_4153_CJM_1976_061_8,
     author = {Blevins, Donald K.},
     title = {Covering {Theorems} for {Univalent} {Functions} {Mapping} onto {Domains} {Bounded} by {Quasiconformal} {Circles}},
     journal = {Canadian journal of mathematics},
     pages = {627--631},
     year = {1976},
     volume = {28},
     number = {3},
     doi = {10.4153/CJM-1976-061-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1976-061-8/}
}