Peng Wang Rui Cai Shi-Qiang Yang A Tennis Video Indexing Approach Through Pattern Discovery in Interactive Process. 49-56 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=3331&spage=49 2004 conf/pcm/2004-1 PCM (1) db/conf/pcm/pcm2004-1.html#WangCY04