@misc{wallmann_new_procedure_1993, 
author={Wallmann, K., Hennies, K., Koenig, I., Petersen, W., Knauth, H.-D.},
title={New procedure for the determination of reactive Fe(III) and Fe(II) minerals in sediments},
year={1993},
howpublished = {journal article},
note = {Wallmann, K.; Hennies, K.; Koenig, I.; Petersen, W.; Knauth, H.: New procedure for the determination of reactive Fe(III) and Fe(II) minerals in sediments. Limnology and Oceanography. 1993. vol. 38, no. 8, 1803-1812.}}