@misc{brandt_screw_pumps_1993, 
author={Brandt, J. U.,Wietstock, P.},
title={Screw pumps for multiphase pumping},
year={1993},
howpublished = {conference paper,conference lecture: Berlin (D); November 3-5, 1992},
note = {Online available at: \url{} (DOI). Brandt, J.; Wietstock, P.: Screw pumps for multiphase pumping. In: Commission of the European Communities (Ed.): Oil and Gas Technology in a Wider Europe: Proceedings of the 4th EC Symposium. Berlin (D). 1993. 83-94.}}