@book{73610,
editor = {Anders Björner and Michel Las Vergnas and Bernd Sturmfels and Neil L. White and Günter M. Ziegler},
title = {{Oriented matroids}},
pages = {XII, 516},
publisher = {Cambridge University Press},
address = {Cambridge},
year = {1993},
series = {Encyclopedia of mathematics and its applications},
volume = {46},
isbn = {0-521-41836-4},
}