Shengquan Wang Dong Xuan Wei Zhao Analyzing and enhancing the resilience of structured peer-to-peer systems. 207-219 2005 65 J. Parallel Distrib. Comput. 2 http://dx.doi.org/10.1016/j.jpdc.2004.09.009 db/journals/jpdc/jpdc65.html#WangXZ05