@article{GDZPPN002082764,
title = {An extension of Blaschke's theorem in the plane.},
journal = {Elemente der Mathematik},
volume = {46},
year = {1991},
pages = {102-106},
zbl = {0738.52009},
url = {http://dml.mathdoc.fr/item/GDZPPN002082764}
}
Scott, P.R. An extension of Blaschke's theorem in the plane.. Elemente der Mathematik, Tome 46 (1991) pp. 102-106. http://gdmltest.u-ga.fr/item/GDZPPN002082764/