K. C. Smith, “Light and Life: The Photobiological Basis of the Therapeutic Use of Radiation from Lasers,” In: T. Oshiro and R. G. Calderhead, Eds., Progress in Laser Therapy Selected Papers from the 1st Meeting of the International Laser Therapy Association, Okinawa, 1990, pp. 11-18.
 T. Dai, B. Pikkula, V. Wang and B. Anvari, “Comparison of Human Skin Opto-Thermal Response to Near-Infrared and Visible Laser Irradiations: A Theoretical Investigation,” Physics in Medicine and Biology, Vol. 49, No. 21, 2004, pp. 4861-4877. doi:10.1088/0031-9155/49/21/002
 A. Loria and R. Kelly, “A Semiglobally Stable Output Feedback PI2D Regulator for Robot Manipulators,” IEEE Transactions on Automatic Control, Vol. 40, No. 8, 1995, pp. 1432-1436. doi:10.1109/9.402235
 A. S. Prasad, “Clinical and Biochemical Spectrum of Zinc Deficiency in Human Subjects,” In: A. S. Prasad, Ed., Clinical, Biochemical and Nutritional Aspects of Trace Elements, Alan R. Liss, Inc., New York, 1982.
 B. Kao, K. Kelly, G. Aguilar, Y. Hosaka, R. Barr and J. Nelson, “Evaluation of Cryogen Spray Cooling Exposure on in Vitro Model Human Skin,” Lasers in Surgery and Medicine, Vol. 34, No. 2, 2004, pp. 146-154. doi:10.1002/lsm.10245
 R. Goepel, “Low Level Laser Therapy in France,” In: T. Oshiro and R. G. Calderhead, Eds., Progress in Laser Therapy. Selected Papers from the 1st meeting of the International Laser Therapy Association, Okinawa, 1990, pp. 71-74.
 K. Suthamjariya, W. Farinelli, W. Koh and R. Anderson, “Mechanisms of Microvascular Response to Laser Pulses,” Journal of Investigative Dermatology, Vol. 122, No. 2, 2004, pp. 518-525. doi:10.1046/j.0022-202X.2004.22241.x
 S. LO and J. Nelson, “On the Physics of Laser-Induced Selective Photothermolysis of Hair Follicles: Influence of Wavelength, Pulse Duration, and Epidermal Cooling,” Journal of Biomedical Optics, Vol. 9, No. 2, 2004, pp. 353-361. doi:10.1117/1.1646174