@misc{greim_neutron_sources_1992, 
author={Greim, L.,Leeflang, H. P.,Matfield, R.},
title={Neutron sources},
year={1992},
howpublished = {book part},
note = {Online available at: \url{} (DOI). Greim, L.; Leeflang, H.; Matfield, R.: Neutron sources. In: Domanus, J. (Ed.): Practical Neutron Radiography. Dordrecht: Kluwer. 1992. 12-25.}}