@misc{doerffer_pigment_index_1998, 
author={Doerffer, R.,Schiller, H.},
title={Pigment index, sediment and gelbstoff retrieval from directional water leaving radiance reflectances using inverse modelling technique},
year={1998},
howpublished = {report part},
note = {Online available at: \url{} (DOI). Doerffer, R.; Schiller, H.: Pigment index, sediment and gelbstoff retrieval from directional water leaving radiance reflectances using inverse modelling technique. In: Algorithm Theoretical Basis Document ATBD 2.12, ESA Coc. No. PO-TN-MEL-GS-0005. 1998. 12.}}