Liangliang Cao Yingli Tian Zicheng Liu Benjamin Yao Zhengyou Zhang Thomas S. Huang Action detection using multiple spatial-temporal interest point features. 340-345 2010 ICME http://dx.doi.org/10.1109/ICME.2010.5583562 conf/icmcs/2010 db/conf/icmcs/icme2010.html#CaoTLYZH10