1. Stanaway, S. 1988 A numerical study of viscous vortex rings using a spectral method.PhD Thesis,Aeronautics and Astronautics Dept., Stanford University.Also NASA TM 101041.
2. Lamb, H. 1932 Hydrodynamics .Cambridge University Press.
3. Robinson, S. K. 1991 Coherent motions in the turbulent boundary layer.Ann. Rev. Fluid Mech. 23,601–639.
4. Jiménez, J. & Moin, P. 1991 The minimal flow unit in near wall turbulence.J. Fluid Mech. 225,213–241.
5. Kambe, T. & Minota, T. 1983 Acoustic wave radiated by head-on collision of two vortex rings.Proc. R. Soc. Lond. A386,277–308.