@misc{paul_hollow_fiber_1993, 
author={Paul, D., Albrecht, W., Weigel, T.},
title={Hollow fiber membranes from polyacrylonitrile for blood purification},
year={1993},
howpublished = {journal article},
note = {Paul, D.; Albrecht, W.; Weigel, T.: Hollow fiber membranes from polyacrylonitrile for blood purification. International Journal of Artificial Organs. 1993. vol. 17, no. 6, 503.}}