Lei Guo Enhua Tan Songqing Chen Zhen Xiao Xiaodong Zhang Does internet media traffic really follow Zipf-like distribution? 359-360 2007 conf/sigmetrics/2007 SIGMETRICS http://doi.acm.org/10.1145/1254882.1254929 db/conf/sigmetrics/sigmetrics2007.html#GuoTCXZ07