D. Latella, and M. Massink. ISSTA '02: Proceedings of the 2002 ACM SIGSOFT international symposium on Software testing and analysis, 27, page 144--153. New York, NY, USA, ACM Press, (July 2002)
S. Kansomkeat, and W. Rivepiboon. SAICSIT '03: Proceedings of the 2003 annual research conference of the South African institute of computer scientists and information technologists on Enablement through technology, page 296--300. , Republic of South Africa, South African Institute for Computer Scientists and Information Technologists, (2003)