1. Erosion resistance of candidate materials for subsea gas chokes;Hutchings;Report for Norsk Hydro a.s,1990
2. Solid particle erosion of stainless steel, tungsten carbide and Syndite;Kaye;Report for Norsk Hydro a.s,1992
3. Joint Industry Project, Subsea Diamond Choke, Norsk Hydro.
4. T. Søntvedt, Erosion of ductile steel components. Effect of erosion on CO2 corrosion of 13% Cr and duplex steels, Norsk Hydro Rep. R-064947.