Yajie Liu Wenhua Dou Heying Zhang A Heuristic Packet Scheduling Algorithm for Media Streaming with Server Diversity. 602-609 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3331&spage=602 2004 conf/pcm/2004-1 PCM (1) db/conf/pcm/pcm2004-1.html#LiuDZ04