@article{CMH_1975__50_139634,
     author = {B. Rodin and C.D. Minda},
     title = {Extremal {Length,} {Extremal} {Regions} and {Quadratic} {Differentials.}},
     journal = {Commentarii mathematici Helvetici},
     pages = {455--476},
     publisher = {mathdoc},
     volume = {50},
     year = {1975},
     zbl = {0322.30012},
     url = {http://geodesic.mathdoc.fr/item/CMH_1975__50_139634/}
}