Keisuke Ishibashi Tatsuya Mori Ryoichi Kawahara Yutaka Hirokawa Atsushi Kobayashi Kimihiro Yamamoto Hitoaki Sakamoto Shoichiro Asano Finding Cardinality Heavy-Hitters in Massive Traffic Data and Its Application to Anomaly Detection. 1331-1339 2008 91-B IEICE Transactions 5 http://dx.doi.org/10.1093/ietcom/e91-b.5.1331 db/journals/ieicet/ieicet91b.html#IshibashiMKHKYSA08