Integrable systems : twistors, loop groups, and Riemann surfaces : based on lectures given at a conference on integrable systems organized by N.M.J. Woodhouse and held at the Mathematical Institute, University of Oxford, in September 1997
N.J. Hitchin, Savilian professor of Geometry, University of Oxford, G.B. Segal, Lowndean professor of Astronomy and Geometry, University of Cambridge, R.S. Ward, professor of Mathematics, University of Durham.