@misc{luther_efficiency_of_1988, 
author={Luther, G., Bennett, P. B., Elsner, W., Holthaus, J., Schafstall, H.-G., Schmidt, K., Vollbrandt, J.},
title={Efficiency of working divers in depths down to 600 m},
year={1988},
howpublished = {GKSS report},
note = {Luther, G.; Bennett, P.; Elsner, W.; Holthaus, J.; Schafstall, H.; Schmidt, K.; Vollbrandt, J.: Efficiency of working divers in depths down to 600 m. In: 20th Annual Offshore Technology Conference 1988; Proceedings. Houston, TX (USA). 1988. 227-235.}}