Georgia Frantzeskou Stephen G. MacDonell Efstathios Stamatatos Stefanos Gritzalis Examining the significance of high-level programming features in source code author classification. 447-460 2008 81 Journal of Systems and Software 3 http://dx.doi.org/10.1016/j.jss.2007.03.004 db/journals/jss/jss81.html#FrantzeskouMSG08