Characteristic algebras of fully discrete hyperbolic type equations. Habibullin, Ismagil T. (2005) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
Conservation laws of discrete Korteweg-de Vries equation. Rasin, Olexandr G., Hydon, Peter E. (2005) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]
Continuous and discrete (classical) Heisenberg spin chain revised. Ragnisco, Orlando, Zullo, Federico (2007) SIGMA. Symmetry, Integrability and Geometry: Methods and Applications [electronic only]