@misc{christensen_vapor_recovery_1991, 
author={Christensen, T.,Kyburz, E.,Ohlrogge, K.},
title={Vapor recovery membrane system},
year={1991},
howpublished = {conference lecture: Gothenburg (S); October 10, 1991},
note = {Online available at: \url{} (DOI). Christensen, T.; Kyburz, E.; Ohlrogge, K.: Vapor recovery membrane system. Hydrocarbon Vapor Recovery Conference. Gothenburg (S), 1991.}}