@misc{hofmann_polymere_stark_1989, 
author={Hofmann, D.,Geiss, D.},
title={Polymere stark wie Stahl},
year={1989},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Hofmann, D.; Geiss, D.: Polymere stark wie Stahl. Spektrum (Deutsche Akademie der Wissenschaften). 1989. vol. 20, no. 78, 22-24.}}