TY  - JOUR
AU  - J. Richter-Gebert
AU  - N.E. Mnëv
TI  - Two Constructions of Oriented Matroids with Disconnected Extension Space.
JO  - Discrete & computational geometry
PY  - 1993
SP  - 271
EP  - 286
VL  - 10
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DCG_1993__10_2_131276/
ID  - DCG_1993__10_2_131276
ER  -