Nature12888
Twistors and Pertubative Gravity including work (2005) with Z Bern, S Bidder, E Bjerrum-Bohr, H Ita, W Perkins, K Risager From Twistors to Amplitudes 2005.
Twistors and Pertubative Gravity
Recursive Approaches to QCD Matrix Elements including work with Z. Bern, S Bidder, E Bjerrum-Bohr, L. Dixon, H Ita, D Kosower W Perkins K. Risager RADCOR.
