@misc{spychala_prompt_gammaray_1987, 
author={Spychala, M.,Michaelis, W.,Fanger, H.-U.},
title={Prompt Gamma-ray neutron activation analysis of river sediments},
year={1987},
howpublished = {journal article,GKSS report},
note = {Online available at: \url{} (DOI). Spychala, M.; Michaelis, W.; Fanger, H.: Prompt Gamma-ray neutron activation analysis of river sediments. Nuclear Geophysics. 1987. vol. 1, no. 4, 309-317.}}