1. M. Copperi D. Sereno Improved LPC excitation based on pattern classification and perceptual criteria 1984 860 862
2. M. Copperi D. Sereno Vector quantization and perceptual criteria for low-rate coding of speech 1985 252 255
3. M. R. Schroeder B. Atal Code-Excited Linear Prediction (CELP): high-quality speech at very low bit rates 1985 937 940
4. K. Mano T. Moriya 4.8 kbit/s delayed decision CELP coder using tree coding 1990 21 24
5. M. Copperi A low bit-rate CELP coder based on multi-path search methods 1992 25 28