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@article{MZ_1932__35_168341, author = {R. G., Bose}, title = {On the number of circles of curvature perfectly enclosing or perfectly enclosed by a closed convex oval}, journal = {Mathematische Zeitschrift}, pages = {16--24}, publisher = {mathdoc}, volume = {35}, year = {1932}, zbl = {0003.40903}, url = {http://geodesic.mathdoc.fr/item/MZ_1932__35_168341/} }
R. G., Bose. On the number of circles of curvature perfectly enclosing or perfectly enclosed by a closed convex oval. Mathematische Zeitschrift, Tome 35 (1932), pp. 16-24. http://geodesic.mathdoc.fr/item/MZ_1932__35_168341/