M. Lungu, und M. Lanza. European Conference on Software Maintenance and Reengineering (CSMR), Seite 91--100. Amsterdam, IEEE Computer Society, (21-23 March 2007)
M. Consens, A. Mendelzon, und A. Ryman. International Conference on Software Engineering, Seite 138 - 156. Melbourne, Australia, IEEE, (11--15 May 1992)