@misc{schafstall_research_and_1991, 
author={Schafstall, H.-G.,Seeliger, D.,Donker, B.},
title={Research and development trends in underwater technology: cost reduction in offshore oil and gas production},
year={1991},
howpublished = {conference lecture: Jakarta (RI); 06.-08.05.1991},
note = {Online available at: \url{} (DOI). Schafstall, H.; Seeliger, D.; Donker, B.: Research and development trends in underwater technology: cost reduction in offshore oil and gas production. International Maritime Conference. Jakarta (RI), 1991.}}