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@article{MS2_1979__45_166678, author = {Helge Tverberg}, title = {A seperation property of plane convex sets.}, journal = {Mathematica Scandinavica}, pages = {255--260}, publisher = {mathdoc}, volume = {45}, year = {1979}, zbl = {0421.52004}, url = {http://geodesic.mathdoc.fr/item/MS2_1979__45_166678/} }
Helge Tverberg. A seperation property of plane convex sets.. Mathematica Scandinavica, Tome 45 (1979), pp. 255-260. http://geodesic.mathdoc.fr/item/MS2_1979__45_166678/