1. Interferential Therapy B;Hogenkamp, M.; Mittelmeijer, E.; Smits, I.; Van Stralen, C.;V. Enraf-Nonius,1987
2. Interference current;Kloth, L.;Ch,1987
3. Electricity Fields and Waves in Therapy;Ward, A.R.,1980
4. Basic Guidelines for Interferential Therapy;De Domenico, G.,1981
5. New Dimensions in Interferential Therapy: A Theoretical and Clinical Guide;De Domenico, G.