Eastwood, Michael George2007-11-132007-11-132001Further advances in twistor theory. Vol. III, Curved twistor spaces / L.J. Mason, L.P. Hughston, P.Z. Kobak, and K. Pulverer (eds.), pp. 194-1951584880473http://hdl.handle.net/2440/39438enBook chapter002007328620071112144624