Müller, Jürgen ; Massoth, Michael (2010):
Advanced Consideration of a Caller Pre-Validation Against Direct Spam Over Internet Telephony.
In: International Journal on Advances in Telecommunications, 3 (3&4), pp. 193--202. [Article]

Müller, Jürgen ; Massoth, Michael (2010):
Abwehr von Direct Spam over Internet Telephony mittels Anrufer Pre-Validierung.
In: Technologien und Anwendungen - Vorträge der 15. ITG-Fachtagung,
[Conference or Workshop Item]

Müller, Jürgen ; Massoth, Michael (2010):
Defense Against Direct Spam Over Internet Telephony by Caller Pre-Validation.
In: Proceedings of the 6th Advanced International Conference on Telecommunications (AICT'10), pp. 172-177,
IEEE, DOI: 10.1109/AICT.2010.40,
[Conference or Workshop Item]