@article{MAN_1967__173_161605,
     author = {Andrew Sobczyk},
     title = {Minkowski {Planes}},
     journal = {Mathematische Annalen},
     pages = {181--190},
     year = {1967},
     volume = {173},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MAN_1967__173_161605/}
}