A family of phase complementary filters. - R. J. Linggard; B. D. V. Smith (ICASSP, 1979)

Analytic pole-zero modelling of speech spectra. - F. J. Owens; R. J. Linggard (ICASSP, 1982)

Information Retrieval by Voice Input and Output. - Francis Jack Smith; R. J. Linggard (SIGIR, 1982)

Pitch detection using harmonic histograms. - R. J. Linggard; W. Millar (Speech Commun., 1982)

Pole/zero modelling of speech spectra. - R. J. Linggard; F. J. Owens (Speech Commun., 1982)