Martin Stig Stissing Thomas Mailund Christian N. S. Pedersen Gerth Stølting Brodal Rolf Fagerberg Computing the All-Pairs Quartet Distance on a Set of Evolutionary Trees. 91-100 2007 conf/apbc/2007 APBC http://www.comp.nus.edu.sg/~wongls/psZ/apbc2007/apbc145a.pdf db/conf/apbc/apbc2007.html#StissingMPBF07