@article{GDZPPN00220472X,
title = {A new isometric inequality.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {374},
year = {1987},
pages = {22-30},
zbl = {0611.52009},
url = {http://dml.mathdoc.fr/item/GDZPPN00220472X}
}
Wills, J.M.; Gritzmann, P.; Wrase, D. A new isometric inequality.. Journal für die reine und angewandte Mathematik, Tome 374 (1987) pp. 22-30. http://gdmltest.u-ga.fr/item/GDZPPN00220472X/