Kupczik, G.: Sielwolf-Verfahren zur Reinigung großvolumiger Abwasserkanäle. Documentation 1st International Conference on Pipeline Construction 1987 Hamburg, Part I, pp. I/861 - I/866.
Source: STEIN Ingenieure GmbH
Graphical material and visualisations Prof. Dr.-Ing. Stein & Partner GmbH, Bochum.