Relating microscopic charge movement to macroscopic currents: the Ramo-Shockley theorem applied to ion channels.
Nonner W, Peyser A, Gillespie D, Eisenberg B. Relating microscopic charge movement to macroscopic currents: the Ramo-Shockley theorem applied to ion channels. Biophys J. 2004 Dec; 87(6):3716-22.