1. Bechert, D. W.; Hoppe, G.; Reif, W.-E. 1985: On the drag reduction of the shark skin. AIAA Paper 85–0546
2. Bechert, D. W.; Bartenwerfer, M. 1989: The viscous flow on surfaces with longitudinal ribs. J. Fluid Mech. 206, 105–129
3. Bechert, D. W.; Bartenwerfer, M.; Hoppe, G. 1989/90: Turbulent drag reduction by nonplanar surfaces — a survey on the research at TU/DLR Berlin. Proc. IUTAM Symposium: Structure of turbulence and drag reduction. Zürich 1989. (ed. A. Gyr) Berlin Heidelberg New York: Springer
4. Eckelmann, H. 1990: Max-Planck-Institut für Strömungsforschung, Göttingen (personal communication)
5. McLean, J.D.; George-Falvy, D. N.; Sullivan, P. P. 1987: Flight-test of turbulent skin-friction reduction by riblets. Proc. Turbulent drag reduction by passive means, Royal Aeronautical Society, London, 15–17 Sept. 1987