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2. Forouzan, B.A. (2007) Data Communications And Networking (4th Ed). McGraw-Hill, New York (ISBN: 0072967757).
3. Nelson, M. – The Data Compression Book (2nd Ed). IDG Books Worldwide, Inc. (ISBN: 1558514341).
4. Sun, L. et al. (2013) Guide to Voice and Video over IP For Fixed and Mobile Networks, Computer Communications and Networks, DOI:
10.1007/978-1-4471-4905-7_2
, Springer-Verlag London 2013.
5. ITU-T (1988) Pulse code modulation (PCM) of voice frequencies. ITU-T G.711.