1. Union for the Co-ordination of Transmission of Electricity, Homepage,
http://www.ucte.org
2. Grigoras, C.: Digital audio recording analysis – the electric network frequency criterion. International Journal of Speech Language and the Law 12(1), 63–76 (2005)
3. Kajstura, M., Trawinska, A., Hebenstreit, J.: Application of the Electrical Network Frequency (ENF) Criterion – A case of a Digital Recording. Forensic Science International 155, 165–171 (2005)
4. Cooper, A.J.: The electric network frequency (ENF) as an aid to authenticating forensic digital audio recordings – an automated approach, Conference paper. In: AES 33rd International Conference, USA (2008)
5. Brixen, E.B.: Techniques for the authentication of digital audio recordings. In: Presented at the AES 122nd Convention, Vienna (2007)