An 32-kbps ADPCM encoding with a variable initially large leakage and adaptive dual loop predictors. - Yohtaro Yatsuzuka; Henri G. Suyderhoud (ICASSP, 1982)

Impact of noise and encoder/decoder mistracking on ADPCM system performance. - Henri G. Suyderhoud; Spiros Dimolitsas (ICASSP, 1988)