* ITU-T, "Recommendation Z.100 Specification and Description Language (SDL)"* Samek, M., "Practical Statecharts in C/C++", CMP Books, 2002, ISBN 1-57820-110-1.
*ITU-T, "Recommendation Z.100 Specification and Description Language (SDL)"*Samek, M., "Practical Statecharts in C/C++", CMP Books, 2002, ISBN 1-57820-110-1.