@article{AFM_1980_5_1_a4,
     author = {Matti Lehtinen},
     title = {On the inner radius of univalency for non-circular domains},
     journal = {Annales Fennici Mathematici},
     pages = {45--47},
     publisher = {mathdoc},
     volume = {5},
     number = {1},
     year = {1980},
     doi = {10.5186/aasfm.1980.0515},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1980.0515/}
}