1. Syntonic Phototherapy;Gottlieb;Photomed Laser Surg,2010
2. Light and its Rays as medicine, kingdom;Pancoast,1877
3. Principles of light and color;Babbitt Edwin,1878
4. The Syntonic Principle: its relation to health and ocular problems;Spitler,1941
5. Effect of laser on hair growth of mice;Mester;Kiserl Orvostud,1967