@misc{petersen_process_identification_2000, 
author={Petersen, W.,Bertino, L.,Callies, U.,Zorita, E.},
title={Process identification by statistical analysis of water-quality data},
year={2000},
howpublished = {GKSS report},
note = {Online available at: \url{} (DOI). Petersen, W.; Bertino, L.; Callies, U.; Zorita, E.: Process identification by statistical analysis of water-quality data. GKSS 2000-2. 2000.}}