@article{GDZPPN000366196,
title = {Two Constructions of Oriented Matroids with Disconnected Extension Space.},
journal = {Discrete \& computational geometry},
volume = {10},
year = {1993},
pages = {271-286},
zbl = {0789.05021},
url = {http://dml.mathdoc.fr/item/GDZPPN000366196}
}
Richter-Gebert, J.; Mnëv, N.E. Two Constructions of Oriented Matroids with Disconnected Extension Space.. Discrete & computational geometry, Tome 10 (1993) pp. 271-286. http://gdmltest.u-ga.fr/item/GDZPPN000366196/