@misc{pauly_modification_concept_1999, 
author={Pauly, D.},
title={Modification concept for an underwater friction welding system (Studienarbeit)},
year={1999},
howpublished = {study thesis: TU Hamburg-Harburg, FB Schiffbau},
note = {Online available at: \url{} (DOI). Pauly, D.: Modification concept for an underwater friction welding system (Studienarbeit). TU Hamburg-Harburg, FB Schiffbau, 1999.}}