@inbook {hatzilygeroudis2004pass, title = {PASS: An Expert System with Certainty Factors for Predicting Student Success}, booktitle = {Knowledge-Based Intelligent Information and Engineering Systems}, year = {2004}, pages = {292{\textendash}298}, publisher = {Springer}, organization = {Springer}, author = {Hatzilygeroudis, Ioannis and Karatrantou, Anthi and Pierrakeas, C} }