@misc{fritsch_new_maleimide_1989, 
author={Fritsch, D.},
title={New maleimide copolymers with varying gas separation properties},
year={1989},
howpublished = {GKSS report},
note = {Fritsch, D.: New maleimide copolymers with varying gas separation properties. In: Polymeric Materials: Science and Engineering; 198th ACS Meeting: Proceedings of the ACS Division of Polymeric Materials; Preprint book. Miami Beach, FL (USA). 1989. 502-506.}}