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2. Control of the discrete vortices from a delta wing
3. HummelD. “Documentation of Separated Flows for Computational Fluid Dynamics Validation,” Validation of Computational Fluid Dynamics, Vol. 2, AGARD CP-437, Lisbon, May 1988, pp. 1–24.
4. Unsteady flow phenomena over delta wings at high angle of attack
5. Research into vortex breakdown control