3David Balk L, Ann Kedia. PPT: A COTS Integration CASE Study[A].ACM, ICSE. Limerick Ireland, 2000.42-49.
4Femstrom C, Ohlsson L. ESF--An Approac to Iodustrial Software Production[J]. Software Engineering Environments: Research and Practice, 1989. 17-28.
5Verral M S, Morgan L. Tool Integration in CASE Environments: the Softwarew Bus[A]. Computer-Aided Software Engineering, Fifth International Workshop,1992.46-49.