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@article{10_4064_cm_15_1_135_139, author = {B. Gr\"unbaum}, title = {The perimeter f {Minkowski} unit discs}, journal = {Colloquium Mathematicum}, pages = {135--139}, publisher = {mathdoc}, volume = {15}, number = {1}, year = {1966}, doi = {10.4064/cm-15-1-135-139}, language = {en}, url = {http://geodesic.mathdoc.fr/articles/10.4064/cm-15-1-135-139/} }
B. Grünbaum. The perimeter f Minkowski unit discs. Colloquium Mathematicum, Tome 15 (1966) no. 1, pp. 135-139. doi : 10.4064/cm-15-1-135-139. http://geodesic.mathdoc.fr/articles/10.4064/cm-15-1-135-139/
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