A design and computing system for signal processing applications. - H. Gethöffer; K. Hoffmann; A. Lenzer; Nicholas Roethe; H. Waldschmidt (ICASSP, 1979)

An extensible high level language signal processor. - Nicholas Roethe; Joachim Lenzer (ICASSP, 1980)

Architecture and programming of a multirate digital filter. - Nicholas Roethe (ICASSP, 1983)

A CMOS implementation of the ESA/390 mainframe architecture. - Nicholas Roethe; Udo Wille (Microprocessing and Microprogramming, 1991)