K. S. Choi is the author of Emerging Techniques in Drag Reduction, published by Wiley.

• [1] Reviews on emerging techniques. Riblets: main known and unknown features Riblets and other methods of controlling near-wall turbulenceTurbulent drag reduction strategies[2] Riblets and LEBUs. Effects of riblets on the growth of laminar and turbulent boundary layersNear-wall flow structure in a low Reynolds number turbulent boundary layer over misaligned ribsStudy of the influence of external manipulators on the near-wall turbulence structure using wall-pressure fluctuations[3] Compliant walls. Improved optimization of compliant walls for transition delayAnalysis of four types of viscoelastic coating for turbulent drag reductionThe measurement of dynamic properties of viscoelastic materials for turbulent drag reduction[4] New approaches. The feasibility of using passive porous walls for drag reductionVariation of skin friction for a turbulent boundary layer interacting with the controlled longitudinal vortex arraysReduction of parasitic effects related to the turbulent boundary layer on the fuselage using slot suction[5] Aircraft applications. HLFC for commercial aircraft: ELFIN 1 results on boundary layer suctionImproving aerodynamic characteristics by means of turbulence management: a Fokker viewEffect of lip configuration on the drag of a circular cavity