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Evidence for Unstable Periodic Orbits in Intact Swimming Lampreys, Isolated Spinal Cords, and Intermediate Preparations a

A. Cohen, N. Mellen, M. Spano, 1998, Annals of the New York Academy of Sciences.

Stable lamprey swimming on a skeleton of unstable periodic orbits

Sarah Lesher, Mark L. Spano, Nicholas M. Mellen, 1999, Neurocomputing.