Transactions on rough sets IX / 
James F. Peters, Andrzej Skworon, Henryk Rybinski 
 - Berlin :  Springer,  c2009 
 - x, 750 p. :  ill. ;  24 cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>9783540898757 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Rough sets<br/>Algebra, Boolean<br/>Data mining