ISO/IEC International Standard IS 11172-3.  "Information Technology - Coding of Moving Pictures and Associated Audio for Digital Storage Media at up to about 1.5 Mbits/sec - Part 3:  Audio".

ISO/IEC Internation Standard IS 13818-3.  "Information Technology - Generic Coding of Moving Pictures and Associated Audio:  Audio".

Pan, D.  "A Tutorial on MPEG/Audio Compression", IEEE Multimedia Journal, Summer 1995.

Painter, T.  "Perceptual Coding of Digital Audio",  Proceedings of the IEEE, Vol. 88, No. 4, April 2000;
pp. 451-506.