Fan R. K. Chung Ronald L. Graham Ranjita Bhagwan Stefan Savage Geoffrey M. Voelker 1309-1316 2006 72 J. Comput. Syst. Sci. 8 http://dx.doi.org/10.1016/j.jcss.2006.07.001 db/journals/jcss/jcss72.html#ChungGBSV06