Broadcasting-quality transmission of audio signals at 64 kbps. - Luciano Bertorello; Maurizio Copperi; Giancarlo Pirani; Fulvio Rusina (ICASSP, 1982)

Design of a 4.8/9.6 kbps baseband LPC coder using split-band and vector quantization. - Luciano Bertorello; Maurizio Copperi (ICASSP, 1983)

16 kbit/s Split-band APC coder using vector quantization and dynamic bit allocation. - Maurizio Copperi; Daniele Sereno; Luciano Bertorello (ICASSP, 1986)