@misc{guenther_the_impact_1993, 
author={Guenther, H.,Lionello, P.,Hansen, B.},
title={The impact of ERS-1 altimeter on the wave analysis and forecast},
year={1993},
howpublished = {GKSS report},
note = {Online available at: \url{} (DOI). Guenther, H.; Lionello, P.; Hansen, B.: The impact of ERS-1 altimeter on the wave analysis and forecast. GKSS 93-E-44. 1993.}}