Bäcklund transformations for the Kirchhoff top. Ragnisco, Orlando, Zullo, Federico (2011) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
Bäcklund transformations for the trigonometric Gaudin magnet. Ragnisco, Orlando, Zullo, Federico (2010) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]