Frequency structure of the nonlinear instability of a dragged viscous thread, by Robert L. Welch, Billy Szeto and Stephen W. Morris, Physical Review E, 85, 066209 (2012).
The meandering instability of a viscous thread, by Stephen W. Morris, Jonathan H. P. Dawes, Neil M. Ribe, and John R. Lister, Physical Review E, 77, 066218 (2008).
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