Oriented matroids/ 
Anders Björner ... [et al.]. 
 - Cambridge, UK  New York:  Cambridge University Press,  1993. 
 - xii, 516 p.:  ill.;  24 cm. 
 - Encyclopedia of mathematics and its applications;  46. .
<br/><br/>Includes bibliographical references (p. 480-509) and index. 
<br/><br/><label>ISBN: </label>0521418364 (hardback) 
<br/><br/><label>LCCN: </label>93202338 
<br/><br/><label>Nat. Bib. No.: </label>GB93-29945 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Matroids<br/>Linear programming.<br/>Matroides.
<br/><br/><label>Dewey Class. No.: </label>511.6  / O69