H. Hühnerfuss, W. Alpers, A. Gericke, P. A. Lange, R. Theis, V. Wismann; Classification of sea slicks by multi-frequency radar techniques: The influence of the temperature and of the morphology effect on water wave damping, Proceedings of IEEE OCEANS'93 Conference, pp. 336 - 341, October 1993.
Volkmar Wismann, Reinhard Theis, Werner Alpers, Heinrich Hühnerfuss; The damping of short gravity-capillary waves by experimental sea slicks measured by an airborne multi-frequency microwave scatterometer, Proceedings of IEEE OCEANS'93 Conference, pp. 342 - 347, October 1993.
V. Wismann, M. Gade, W. Alpers, H. Hühnerfuss; Radar signatures of mineral oil spills measured by an airborne multi-frequency multi-polarization microwave scatterometer, Proceedings of IEEE OCEANS'93 Conference, pp. 348 - 353, October 1993.