Yiannis Kanellopoulos Christos Makris Christos Tjortjis An improved methodology on information distillation by mining program source code. 359-383 2007 61 Data Knowl. Eng. 2 http://dx.doi.org/10.1016/j.datak.2006.06.002 db/journals/dke/dke61.html#KanellopoulosMT07