@misc{ohlrogge_helium_recovery_1988, 
author={Ohlrogge, K.,Peinemann, K.-V.,Hattenbach, K.,Behling, R.-D.},
title={Helium recovery from deep diving atmospheres},
year={1988},
howpublished = {conference lecture: Qiryat Anavim (IL); 07.-09.03.1988},
note = {Online available at: \url{} (DOI). Ohlrogge, K.; Peinemann, K.; Hattenbach, K.; Behling, R.: Helium recovery from deep diving atmospheres. International Workshop on Membranes for Gas and Vapor Separation. Qiryat Anavim (IL), 1988.}}