A design method for half-band filters - Alan N. Willson Jr.; Henry John Orchard (9th European Signal Processing Conference, EUSIPCO 1998, Island of Rhodes, Greece, 8-11 September, 1998, 1998)

An improvement to the Powell and Chau linear phase IIR filters - Alan N. Willson Jr.; Henry John Orchard (IEEE Trans. Signal Process., 1994)

An improvement to the Powell and Chau linear phase IIR filters - Alan N. Willson Jr.; Henry John Orchard (Proceedings of ICASSP '94: IEEE International Conference on Acoustics, Speech and Signal Processing, Adelaide, South Australia, Australia, April 19-22, 1994, 1994)

A theorem providing bounds on digital filter scaling factors - R. H. Brackert; Henry John Orchard; Alan N. Willson Jr. (IEEE Trans. Signal Process., 1991)

Design Technique for Vestigial-Sideband Filters - Henry John Orchard; Gabor C. Temes (IEEE Trans. Commun., 1974)