%0 Journal Article %A FORDY, A. P. %T SYMMETRIES, LADDER OPERATORS AND QUANTUM INTEGRABLE SYSTEMS %J Glasgow mathematical journal %D 2005 %P 65-75 %V 47 %N A %U http://geodesic.mathdoc.fr/articles/10.1017/S0017089505002296/ %R 10.1017/S0017089505002296 %F 10_1017_S0017089505002296