1. Lecture Notes in Computer Science;P. Baker,2005
2. Weigert, T., Reed, R.: Specifying Telecommunications Systems with UML. In: Lavagno, L., Martin, G., Selic, B. (eds.) UML for Real: Design of Embedded Real-Time Systems, Kluwer Academic Publisher, Amsterdam (2003)
3. Haugen, Ø., Møller-Pedersen, B., Weigert, T.: Structural Modeling with UML 2. In: Lavagno, L., Martin, G., Selic, B. (eds.) UML for Real: Design of Embedded Real-Time Systems, Kluwer Academic Publisher, Amsterdam (2003)
4. International Telecommunications Union, SDL Combined With UML, ITU-T Rec. Z.109 (2007)
5. International Telecommunications Union, Abstract Syntax Notation One (ASN.1) & ASN.1 Encoding Rules, ITU-T Rec. X.680–X.693 (2002)