A Spectral Theory for Hybrid Modulation. - Gordon B. Lockhart (IEEE Trans. Commun., 1973)

Waveform substitution techniques for recovering missing speech segments in packet voice communications. - David J. Goodman; O. G. Jaffe; Gordon B. Lockhart; W. C. Wong 001 (ICASSP, 1986)

Waveform substitution techniques for recovering missing speech segments in packet voice communications. - David J. Goodman; Gordon B. Lockhart; Ondria J. Wasem; Wai-Choong Wong (IEEE Trans. Acoust. Speech Signal Process., 1986)

An embedded scheme for regular pulse excited (RPE) linear predictive coding. - Shude Zhang; Gordon B. Lockhart (ICASSP, 1995)

Non-linear techniques for pitch and waveform enhancement in PWI coders. - Hui Li; Gordon B. Lockhart (ICASSP, 1997)

Embedded RPE based on multistage coding. - Shude Zhang; Gordon B. Lockhart (IEEE Trans. Speech Audio Process., 1997)