1. K. A. Cliffe and A. C. Greenfield (private communication).
2. Bifurcations of two-dimensional channel flows
3. T. Mullin and K. A. Cliffe, inNonlinear Phenomena and Chaos, edited by S. Sarkar (Hilger, Bristol, 1986), p. 96.
4. The mechanics of large bubbles rising through extended liquids and through liquids in tubes