Y. Zou, and M. Hung. ICPC '06: Proceedings of the 14th IEEE International Conference on Program Comprehension, page 127-136. IEEE Computer Society, (2006)
J. Cordy, R. Lämmel, and A. Winter. Transformation Techniques in Software Engineering, 05161, Internationales Begegnungs- und Forschungszentrum fuer Informatik
(IBFI), Schloss Dagstuhl, Germany, (2006)$<$http://drops.dagstuhl.de/opus/volltexte/2006/497$>$ date of citation:
2006-01-01.