He Chuan Bin Du Sanli Li Grid Services Performance Tuning in OGSA. 373-381 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2834&spage=373 2003 conf/appt/2003 APPT db/conf/appt/appt2003.html#ChuanDL03