@article{ELMA_1991__46_2_141510,
     author = {P.R. Scott},
     title = {An extension of {Blaschke's} theorem in the plane.},
     journal = {Elemente der Mathematik},
     pages = {102--106},
     publisher = {mathdoc},
     volume = {46},
     number = {2},
     year = {1991},
     zbl = {0738.52009},
     url = {http://geodesic.mathdoc.fr/item/ELMA_1991__46_2_141510/}
}