@misc{_proceedings_of_1991, 
author={
title={Proceedings of the 3rd International Symposium on Underwater Technology},
year={1991},
howpublished = {conference proceedings,GKSS report},
note = {Online available at: \url{} (DOI). Schafstall, H.; Schultheiss, G.; Seeliger, D. (Ed.): Proceedings of the 3rd International Symposium on Underwater Technology. 1991.}}