I.T. Habibullin, V.V. Sokolov and R.I. Yamilov, Multi-component integrable systems and nonassociative structures, In: Proceedings of 1st Int. Workshop on Nonlinear Physics: Theory and Experiment, Gallipoli, Italy, 29 June — 7 July 1995 (Eds: E. Alfinito, M. Boiti, L. Martina, F. Pempinelli), World Scientific Publishing, 1996, 139—168.