Naoyuki Kitazawa Akira Osada Kazuyuki Kamijo Haruhiko Kaiya Kenji Kaijiri So/M: A Requirements Definition Tool Using Characteristics of Existing Similar Systems. 255-262 2008 COMPSAC http://doi.ieeecomputersociety.org/10.1109/COMPSAC.2008.41 conf/compsac/2008 db/conf/compsac/compsac2008.html#KitazawaOKKK08