Weiqin Tong Jingbo Ding Jianquan Tang Bo Wang Lizhi Cai A Service-Based Hierarchical Architecture for Parallel Computing in Grid Environment. 641-644 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3032&spage=641 2003 conf/gcc/2003-1 GCC (1) db/conf/gcc/gcc2003-1.html#TongDTWC03