@Book{CLRS09,
  author = 	 { Thomas H. Cormen and Charles E. Leiserson and Ronald L. Rivest and Clifford Stein },
  title = 	 { Introduction to Algorithms },
  publisher = 	 { MIT Press },
  OPTyear = 	 { 2009 },
  date =         { 2009 },                  
  edition = 	 { Third edition },
  url =          { http://mitpress.mit.edu/catalog/item/default.asp?ttype=2&tid=11866 },                  
  urla =         { <a href="http://www.cs.dartmouth.edu/~thc/clrs-bugs/bugs-3e.php">errata</a> },
  urlb =         { <a href="http://www.cs.dartmouth.edu/~thc/">thc-faq</a> },                  
}