Jihyun Park Renzhe Yu Fernando Rodriguez Rachel B. Baker Padhraic Smyth Mark Warschauer Understanding Student Procrastination via Mixture Models. 2018 EDM http://educationaldatamining.org/files/conferences/EDM2018/papers/EDM2018_paper_122.pdf conf/edm/2018 db/conf/edm/edm2018.html#ParkYRBSW18