@misc{torster_the_use_1997, 
author={Torster, F.,dos Santos, J. F.,Hutt, G.,Kocak, M.},
title={The use of titanium alloys for dynamic risers: a literature review},
year={1997},
howpublished = {GKSS report},
note = {Online available at: \url{} (DOI). Torster, F.; dos Santos, J.; Hutt, G.; Kocak, M.: The use of titanium alloys for dynamic risers: a literature review. GKSS 97-E-38. 1997.}}