Mykola Pechenizkiy Nikola Trcka Ekaterina Vasilyeva Wil M. P. van der Aalst Paul De Bra Process Mining Online Assessment Data. 279-288 2009 EDM http://www.educationaldatamining.org/EDM2009/uploads/proceedings/pechenizkiy.pdf conf/edm/2009 db/conf/edm/edm2009.html#PechenizkiyTVAB09