1. V. Evthuhov and J. K. Neeland, Pulsed Ruby Lasers, in Lasers, ed. by A. K. Levine (Marcel Dekker, New York, 1966), Vol. 1, Chap. 1.
2. T. H. Maiman, Stimulated Optical Radiation in Ruby Masers, Nature
187, 493 (1960).
3. T. H. Maiman, Optical Maser Action in Ruby, Brit. Commun. Electron.
7, 674 (1960).
4. D. Findlay and D. W. Goodwin, The Neodymium in YAG Laser, in Advances in Quantum Electronics, ed. by D. W. Goodwin (Academic, New York, 1970), Vol. 1, pp. 77–128.
5. J. G. Danielmeyer, Progress in Nd:YAG Lasers, in Lasers, ed. by A. K. Levine and A. J. De Maria (Marcel Dekker, New York, 1976), Vol. 4, Chap. 1.