Yoshiki Higo Toshihiro Kamiya Shinji Kusumoto Katsuro Inoue Method and implementation for investigating code clones in a software system. 985-998 2007 49 Information & Software Technology 9-10 http://dx.doi.org/10.1016/j.infsof.2006.10.005 db/journals/infsof/infsof49.html#HigoKKI07