Modeling Software Characteristics and Their Correlations in A Specific Domain by Comparing Existing Similar Systems. - Akira Osada; Daigo Ozawa; Haruhiko Kaiya; Kenji Kaijiri (QSIC, 2005)

Proposing metrics of difficulty of domain knowledge using usecase diagrams. - Akira Osada; Daigo Ozawa; Naoyuki Kitazawa; Haruhiko Kaiya; Kenji Kaijiri (SAC, 2008)