Ke Li Wanlei Zhou Shui Yu Bo Dai Effective DDoS Attacks Detection Using Generalized Entropy Metric. 266-280 2009 ICA3PP http://dx.doi.org/10.1007/978-3-642-03095-6_27 conf/ica3pp/2009 db/conf/ica3pp/ica3pp2009.html#LiZYD09