@article{GDZPPN002396858,
title = {Normed vector spaces consisting of classes of convex sets.},
journal = {Mathematische Zeitschrift},
volume = {93},
year = {1966},
pages = {1-19},
zbl = {0141.39003},
url = {http://dml.mathdoc.fr/item/GDZPPN002396858}
}
Ewald, Günter; Shephard, Geoffrey C. Normed vector spaces consisting of classes of convex sets.. Mathematische Zeitschrift, Tome 93 (1966) pp. 1-19. http://gdmltest.u-ga.fr/item/GDZPPN002396858/