1. Bechert, D. & Pfizenmaier, E. 1975 J. Fluid Mech. 71,123–144.
2. Morfey, C. L. 1971 J. Sound Vib. 14,159–170.
3. Carrier, G. F. 1956 Q. Appl. Math. 13,457–461.
4. Heavens, S. N. 1978 J. Fluid Mech. 84,331–335.
5. Messiter, A. F. 1970 SIAM J. Appl. Math. 18,241–257.