Shugao Ma Leonid Sigal Stan Sclaroff Learning Activity Progression in LSTMs for Activity Detection and Early Detection. 1942-1950 2016 CVPR https://doi.org/10.1109/CVPR.2016.214 https://doi.ieeecomputersociety.org/10.1109/CVPR.2016.214 conf/cvpr/2016 db/conf/cvpr/cvpr2016.html#MaSS16