The complete article can be purchased in German at the website of the Journal "Gefahrstoffe - Reinhaltung der Luft", 77(2017) Issue 10, pp. 416-420: "Risk assessment of handling rigid carbon nanotubes at a technical centre in Berlin" (charges may apply).
C. Schumacher, B. Oeffling, C. Möhlmann, C. Monte, S. Plitzko:
Risk assessment of handling rigid carbon nanotubes at a technical centre in Berlin.
in: Gefahrstoffe - Reinhaltung der Luft 77(2017) Issue 10 2017. pages 416-420