@article{1028999082, author = {Robertson, S. A.}, title = {Generalised constant width for manifolds.}, journal = {Michigan Math. J.}, volume = {11}, number = {1}, year = {1964}, pages = { 97-105}, language = {en}, url = {http://dml.mathdoc.fr/item/1028999082} }
Robertson, S. A. Generalised constant width for manifolds.. Michigan Math. J., Tome 11 (1964) no. 1, pp. 97-105. http://gdmltest.u-ga.fr/item/1028999082/