1. Photoelectron Sources: Selection and Analysis;Oettinger,1988
2. High Brightness Electron Injectors;Sheffield,1987
3. Development of a High Brightness Electron Gun for the Accelerator Test Facility at Brookhaven National Laboratory;Batchelor,1988
4. S. Joly, R. Dei-Cas, Cl. Bonetti, F. Cocu, J.P. De Brion, J. Frehaut, G. Haouat, A. Herscovici, H. Leboutet and J. Sigaud, A. High Brightness Photo-Injector For A Free Electron Laser Proposal, ibid.
5. John C. Goldstein, Electron Beam Requirements for Soft X-ray/XUV Free-Electron Lasers, in ref. [2].