Shijie Xu Chi-Hung Chi Cheng Qian Chen Ding Selection Strategy of Rescue Servers Under Hot-Spot Congestion. 468-473 2009 ICIW http://dx.doi.org/10.1109/ICIW.2009.75 conf/iciw/2009 db/conf/iciw/iciw2009.html#XuCQD09