2015 · Rüdiger Nübling, Rainer Kaluscha, et al. · Publication Server of Bonn-Rhein-Sieg University of Applied Sciences (Bonn-Rhein-Sieg University of Applied Sciences) · 2
2018 · Rainer Kaluscha, Rüdiger Nübling, et al. · Publication Server of Bonn-Rhein-Sieg University of Applied Sciences (Bonn-Rhein-Sieg University of Applied Sciences)
2014 · Rüdiger Nübling, U. Kaiser, et al. · Publication Server of Bonn-Rhein-Sieg University of Applied Sciences (Bonn-Rhein-Sieg University of Applied Sciences)