@misc{stuhrmann_neutron_contrast_1999, 
author={Stuhrmann, H. B.},
title={Neutron contrast variation and dynamic nuclear polarization},
year={1999},
howpublished = {journal article},
note = {Online available at: \url{} (DOI). Stuhrmann, H.: Neutron contrast variation and dynamic nuclear polarization. Physica  B. 1999. vol. 267-268, 92-96.}}