Winfried Ilg Johannes Mezger Martin A. Giese Estimation of Skill Levels in Sports Based on Hierarchical Spatio-Temporal Correspondences. 523-531 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2781&spage=523 2003 conf/dagm/2003 DAGM-Symposium db/conf/dagm/dagm2003.html#IlgMG03