1. ‘Dynamic interferential current therapy’;Hansjurgens;Physikalische Medizin und Rehabilitation,1974
2. Pain mechanisms—a new theory;Melzack;Science,1965
3. ‘Interference-current therapy in distortions, contusions and luxations of the joints’;Nikolous-Troeva;Munchener Medizinische Wochenschrift,1967
4. ‘Comparative studies on therapeutic results obtained by means of interferential therapy and other means in arthrosis deformans’;Nikolous-Troeva;Physical Medicine and Rehabilitation,1967
5. ‘Physiotherapeutic rehabilitation in the presence of fracture complications’;Nikolous-Troeva;Munchener Medizinische Wochenschrift,1969