Jörg Rech Björn Decker Eric Ras Andreas Jedlitschka Raimund L. Feldmann The Quality of Knowledge: Knowledge Patterns and Knowledge Refactorings. 74-103 2007 3 IJKM 3 http://www.igi-pub.com/articles/details.asp?ID=7170 db/journals/ijkm/ijkm3.html#RechDRJF07