@article{01216122,
title = {Helly property associated with the discrete planes.},
journal = {Southwest Journal of Pure and Applied Mathematics [electronic only]},
volume = {1},
year = {1998},
pages = {56-63},
zbl = {0905.05059},
language = {en},
url = {http://dml.mathdoc.fr/item/01216122}
}
Bretto, A.; Laget, B. Helly property associated with the discrete planes.. Southwest Journal of Pure and Applied Mathematics [electronic only], Tome 1 (1998) pp. 56-63. http://gdmltest.u-ga.fr/item/01216122/