@inproceedings{SAC-2008-OsadaOKKK,
	author        = "Akira Osada and Daigo Ozawa and Naoyuki Kitazawa and Haruhiko Kaiya and Kenji Kaijiri",
	booktitle     = "{Proceedings of the 23rd Symposium on Applied Computing}",
	doi           = "10.1145/1363686.1363837",
	editor        = "Roger L. Wainwright and Hisham Haddad",
	isbn          = "978-1-59593-753-7",
	pages         = "624--629",
	publisher     = "{ACM}",
	title         = "{Proposing metrics of difficulty of domain knowledge using usecase diagrams}",
	year          = 2008,
}