1. R. W. P. McWhirter and A. G. Hearn, Quasi Steady State Population Densities in Hydrogenic Ions, Proc. Phys. Soc. Land., 82: 641 (1963).
2. R. Wood II and W. T. Silfvast, Electron Density and Energy Output Limits of Plasma-Recombination Lasers, Appl. Phys. Lett. 15: 121 (1982).
3. W. L. Bohn and W. Schall, Scaling Properties of the Plasma Recombination Laser, Conference on Lasers and Electro-Optics, Phoenix Arizona, Technical Digest THT3: 110 (1982).
4. H. R. Griem, “Plasma Spectroscopy”, McGraw-Hill, New-York (1964).
5. W. T. Silfvast and O. R. Wood II, Recombination Laser Transitions in Expanding Plasmas of Mg, Ca, Cu, Zn, Ag, Cd, In, Sn, Pb, and Bi, Optics Letters 7: 34 (1982).