*Nemec H, Endogenous electrostimulation with middle frequencies and interference zones. Rehabilitation (Bonn). 1967;20(1):1-11. PMID: 5613875 | *Nemec H, Endogenous electrostimulation with middle frequencies and interference zones. Rehabilitation (Bonn). 1967;20(1):1-11. PMID: 5613875 |