1. G. D. Baxter, Therapeutic Lasers: Theory and Practice (Churchill Livingstone, Edinburgh, 1994).
2. P. Spaggiari and C. Tribbia, Medicina Quantistica (Tecniche Nuove, Cremona, 2008)
3. J. Tuner and L. Hode, Low Level Laser Therapy: Clinical Practice and Scientific Background (Prima Books, Spjutvagen, 1999)
4. L. Longo, Laser Phys. Lett. 7 (11), 771 (2010).
5. Y. A. Vladimirov, A. N. Osipov, and G. I. Klebanov, Biochemistry (Moscow) 69 (1), 81 (2004).