A procedure was developed for solving the stationary electro-diffusion equations, together with the Poisson equation, by using a perturbation method. It was demonstrated that the use of the Boltzmann equilibrium distribution for the zero-order approximation to the internal solution was incorrect. A correct procedure was developed for obtaining the zero-order approximation.

Solution of the Stationary Electrodiffusion Equations by the Method of Perturbation Theory. G.V.Klimachev: Russian Physics Journal, 2002, 45[8], 759-62