Florin Baboescu Priyank Ramesh Warkhede Subhash Suri George Varghese Fast packet classification for two-dimensional conflict-free filters. 1831-1842 2006 50 Computer Networks 11 http://dx.doi.org/10.1016/j.comnet.2005.08.004 db/journals/cn/cn50.html#BaboescuWSV06