1. P. P. Sorokin and M. J. Stevenson, Stimulated infra-red emission of trivalent uranium, Phys. Rev. Lett. 5, 557–559 (1960).
2. E. Snitzer, Optical maser action of Nd3+ in a barium crown glass, Phys. Rev. Lett. 7, 444–446 (1961).
3. L. R. Solon, Lasers and fusion, Ind. Res. 13 (11), 31–34 (1971).
4. CGE gives details of experiment that produced fusion neutrons, Laser Focus 5, Dec. 14 (1969).
5. Hundred-joule lasers are producing high-temperature plasmas, Phys. Today 22 (11), 55 (1969).