@article{bwmeta1.element.desklight-48afa668-a03b-4bde-a546-4c5dc2bb9bb9,
author = {Ryszard Grz\k a\'slewicz},
title = {Extreme symmetric norms on $R^2$
},
journal = {Colloquium Mathematicae},
volume = {55},
year = {1988},
pages = {147-151},
zbl = {0671.46006},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.desklight-48afa668-a03b-4bde-a546-4c5dc2bb9bb9}
}
Ryszard Grząślewicz. Extreme symmetric norms on $R^2$
. Colloquium Mathematicae, Tome 55 (1988) pp. 147-151. http://gdmltest.u-ga.fr/item/bwmeta1.element.desklight-48afa668-a03b-4bde-a546-4c5dc2bb9bb9/