1. Scarborough J. Roman Medicine. New York: Cornal University Press; 1969. Chapter1.
2. Pipitone N, Scott DL. Magnetic pulse treatment for knee osteoarthritis: a randomised, double-blind, placebo-controlled study. Curr Med Res Opin. 2001; 17(3): 190-196.
3. Thamsborg G, Florescu A, Oturai P, et al . Treatment of knee osteoarthritis with pulsed electromagnetic fields: a randomized, double-blind, placebo-controlled study. Osteoarthritis and Cartilage. 2005 ; 13(7):575-581.
4. Chep p. Action potential stimulation. 2012. APS therapy Online. Availabe at: URL:http://www.apstherapy.com/index.php?lang=en. Accessed Jan 31, 2012.
5. Afshani A.H, Meyar Naeemi A, Afsharpas A. APS therapy booklet. Tehran: Dastavard Sina Publishing ; 1381. [Persian]
6. Oweye, Spielholz and Nelson R. Low-intensity Pulsed Galvanic Current and the Healing of Tenotomized Rat Achilles Tendons: A Preliminary Report Using Load-to-Breaking Measurements. Archives Physical Med Rehab. 1987; 68: 415-418.
7. Heffernan M. Comparative Effects of Microcurrent Stimulation on EEG Spectrum and Correlation Dimension. Integrative and Behavioural Science. 1996. 31 (3): 202-209.
8. Ebnzar John. Essential of orthopaedics for physiotherapist. India: Juypee Brothers Medical Publishers; 2003. Chapters 11, 26.
9. Melzac R, Wall PD. Pain mechanism: a new theory. Science. 1965 ;150(3699):971-979.
10. Mannheimer C, Carlsson C. The analgesic effect of transcutaneus electrical nerve stimulation (TENS) in patients with rheumatoid arthritis. A comparative study in different pulse patterns. Pain. 1979; 6(3): 329–334.
11. Nelson R, Dean C. Principles of electrical stimulation, clinical electrotherapy. 3rd edition. Appleton &Lange Publishers; 1987. P 59-65.
12. Benedetti F, Amanizo M, Casadio C, et al. Control of postoperative pain by transcutaneous electrical nerve stimulation after thoracic operations. Ann Thorac Surg, 1997; 63: 773-776.
13. Seegers JC, ML Lottering, AM Joubert,et al. The effects of a small pulsed DC electric field on ATP and cAMP levels in in vitro and in vivo systems. Medical Hypothesis. 2002; 58(2): 171-176.
14. Papendorp D.Van, C. Maritz and N. Dippenaar, Plasma levels of beta-endorphin, substance P and low encephalin in patients with chronic pain –Geneeskunde-The Medicine Journal. 2002: P 36-40.
15. Zizic TM, Hoffman KC, Holt PA, et al. Treatment of Osteoarthritis of the Knee with pulsed Electrical Stimulation. J Rheumatol 1995; 22: 1757-1761.
16. Berger and L. Matzner, Introducing action potential currents. South African Journal of Anesthesiology and analgesia. 1999; 5(2): 26-36.
17. Papendorp DH van. Assessment of Pain Relief on 285 patients with chronic pain. Biomedical Research (Japan). 2002;26(6):249-253.
18. Bernard C. Award winning pain relief. 2009. APS therapy UK online. Available at:
http://www.apstherapy.com. Accessed: Jan 12, 2009.
19. SeegersJC, C. A. Engelbrecht, D. H. van Papendorp. Activation of signal-transduction mechanisms may underlie the therapeutic effects of an applied electric field. Medical Hypotheses. 2001; 57(2): 224-230.
20. Hamilton SG, McMahon SB. - ATP as a peripheral mediator of pain. J Auton Nerve Syst. 2000; 81(1): 187-194.
21. Papendorp D.H.van, A.M. Joubert, A. Koorts, et al. A comparative study between a DC, MET electrical field (APS Therapy) and conventional TENS on ATP levels in an in vitro system. Biomedical Research (Japan). 2002; 26(6): 249-253.