On complexity of fast convolution algorithms. - H. Gethöffer (ICASSP, 1979)

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

Hardware support for automatic routing. - Erik Damm; H. Gethöffer; K. Kaiser (DAC, 1982)