1. Fluent user's manual. Fluent, New Hampshire, 1997
2. Sand erosion of wear resistant materials: erosion in choke valves;Haugen;Wear,1995
3. Hutchings, I.M., 1984. The erosion of steels by the impact of sand particles. University of Cambridge, UK
4. Erosion in choke valves – oil and gas industry applications;Nøkleberg;WEAR,1995
5. Søntvedt, T. 1989. Erosion of ductile steel components, effect of erosion on CO2 corrosion of 13% Cr and duplex steels. Norsk Hydro Report No. R-064947