1. Acarlar, M. S. and Smith, C. R., 1987. A study of hairpin vortices in a laminar boundary layer. Part 1.Hairpin vortices generated by a hemisphere protuberance. J. Fluid Mech., Vol. 175, 1 – 41.
2. Breuer, K. S., 1988. The development of a localized disturbance in a boundary layer. Mass. Inst. Tech. FDRL Report 88?1, also Ph.D. Thesis, Dept. Aero, and Astro. 183 pages.
3. Corke, T. C., Bar Sever, A., and MORKOVIN, M. V., 1986. Experiments on transition enhancement by distributed roughness. Phys. Fluids, Vol. 29, 3199 – 3213.
4. GREGORY, N. and WALKER, W. S., 1956. The effect on transition of isolated surface excrescences in the boundary layer. Aero. Res. Council R and M, No. 2779.
5. KENDALL, J. M., 1981. Laminar boundary layer velocity dis-tortion by surface roughness: effect upon stability. AIAA Paper 81 – 0195.