@article{GDZPPN002306484,
title = {Minimal Extremal Subsets of the Unit Sphere.},
journal = {Mathematische Annalen},
volume = {196},
year = {1972},
pages = {251-278},
zbl = {0223.46020},
url = {http://dml.mathdoc.fr/item/GDZPPN002306484}
}
Deutsch, Frank; Lindahl, Robert J. Minimal Extremal Subsets of the Unit Sphere.. Mathematische Annalen, Tome 196 (1972) pp. 251-278. http://gdmltest.u-ga.fr/item/GDZPPN002306484/