A novel adaptive predictor DPCM system for speech signals. - Thomas E. Eger; L. William Varner (ICASSP, 1981)

A simple adaptive filtering technique for speech enhancement. - L. William Varner; Thomas A. Miller; Thomas E. Eger (ICASSP, 1983)

A nonlinear spectrum processing technique for speech enhancement. - Thomas E. Eger; James Su; L. William Varner (ICASSP, 1984)