@article{GDZPPN002291851, title = {Convex Bodies and Convexity on Grassmann Cones.}, journal = {Mathematische Annalen}, volume = {152}, year = {1963}, pages = {1-41}, zbl = {0112.37301}, url = {http://dml.mathdoc.fr/item/GDZPPN002291851} }
Busemann, H.; Ewald, G.; SHEPHARD, G.C. Convex Bodies and Convexity on Grassmann Cones.. Mathematische Annalen, Tome 152 (1963) pp. 1-41. http://gdmltest.u-ga.fr/item/GDZPPN002291851/