@article{MZ_1987__195_183680,
     author = {Takeo Ohsawa},
     title = {On the {Hyperbolicity} of {Certain} {Planar} {Domains.}},
     journal = {Mathematische Zeitschrift},
     pages = {127--128},
     publisher = {mathdoc},
     volume = {195},
     year = {1987},
     zbl = {0628.30043},
     url = {http://geodesic.mathdoc.fr/item/MZ_1987__195_183680/}
}