@misc{fink_zur_fibrillarstruktur_1990, 
author={Fink, H.-P.,Hofmann, D.,Purz, H. J.},
title={Zur Fibrillarstruktur nativer Cellulose},
year={1990},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Fink, H.; Hofmann, D.; Purz, H.: Zur Fibrillarstruktur nativer Cellulose. Acta Polymerica. 1990. vol. 41, no. 2, 131-137.}}