1. ISO/IEC JTC1/SC21, Information System Technology - Open System Interconnection – Conformance Testing Methodology and Framework (part 1 – 7), March 14 (1994)
2. Zeng, H., Rayner, D.: Gateway Testing Technique. In: Yemini, Y., et al. (eds.) Protocol Specification, Testing, and Verification, IV, pp. 637–656. North-holland Publishers, Amsterdam (1984)
3. Zeng, H., Zhou, X., Song, B.: On Testing of IP Routers. In: Proceedings of PACAT 2003, pp. 535–540. IEEE press, Los Alamitos (2003)
4. Interoperability Laboratory,
http://www.iol.unh.edu/
5. Xu, M., Wu, J.: An Extension to Concurrent TTCN. In: Proceedings of IEEE INFOCOM 1998, San Francisco, U.S.A., March 1998, pp. 447–454 (1998)