1. , , , , , Appl. Physics B 58, 365 (1994).
2. , , , , in: High Power Diode Lasers: Fundamentals, Technology, Applications Berlin, Heidelberg; Springer Verlag 2000, p. 369 (Topics in Applied Physics, Bd. 78).
3. , , , , , , in: OSA Technical Digest Series, Conference on Lasers and Electro Optics, CLEO'98 (San Francisco 1998). Washington (DC): Optical Society of America, 1998, p. CWF46.
4. , , , , , : in Fejer, M.M.; Injeyan, H.; Keller, U. (Hrsg.): Advanced Solid State Lasers, Boston, 1999. Washington, DC: Optical Society of America, (OSA Trends in Optics and Photonics Series 26, p. 463–467 (1999).
5. , , in: Conference on Lasers and Electro-Optics CLEO '99, Baltimore, 1999. Washington DC: Optical Society of America, 1999, p. 29–30 (OSA Technical Digest Series).