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@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/} }
P.R. Scott. An extension of Blaschke's theorem in the plane.. Elemente der Mathematik, Tome 46 (1991) no. 2, pp. 102-106. http://geodesic.mathdoc.fr/item/ELMA_1991__46_2_141510/