1. Timothy A. Birks and Youwei W. Li, Journal of Lightwave Technology 10, 432 (1992).
2. Timothy E. Dimmick, George Kakarantzas and Timothy A. Birks, Applied Optics 38, 6845 (1999).
3. Timothy E. Dimmick, George Kakarantzas and Timothy A. Birks, Optical Fiber Communication Conference, OSA Technical Digest Series (Optical Society of America), FB4 (2000).
4. G. Kakarantzas, S. G. Leon-saval, T. A. Birks and P. St. J. Russell, Conference on Lasers and Electro-Optics, CWM6 (2004).
5. N. V. Wheeler, M. D. W. Grogan, P. S. Light, F. Couny, T. A. Birks and F. Benabid, Conference on Lasers and Electro-Optics, CTuS5 (2010).