Double photoionization : recent results at Daresbury and perspectives at Trieste L. AVALDI, G. DAWBER, R.I. HALL, G.C. KING, M.A. MacDONALD et A. McCONKEY J. Phys. IV France, 03 C6 (1993) C6-145-C6-158 DOI: 10.1051/jp4:1993614