TY - RPRT TI - Nernst-Planck-Poisson diffusion equation: numerical solution of the boundary value problem. AU - F F Offner PY - 1971 DO - 10.1016/0022-5193(71)90183-4 UR - https://pubmed.ncbi.nlm.nih.gov/5557077/ ID - 5557077 ER -