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  Grundmann, S.; Trinter, F.; Bray, A.W.; Eckart, S.; Rist, J.; Kastirke, G.; Metz, D.; Klumpp, S.; Viefhaus, J.; Schmidt, L. Ph. H.; Williams, J.B.; Dörner, R.; Jahnke, T.; Schöffler, M.S.; Kheifets, A.: Separating Dipole and Quadrupole Contributions to Single-Photon Double Ionization. Physical Review Letters 121 (2018), p. 173003/1-5

10.1103/PhysRevLett.121.173003
Open Access Version (externer Anbieter)