1. L. Liberty, inMass Transfer and Kinetics of Ion Exchange. L. Liberty and F. Helfferich, Eds., Martin Nijhoff, Hague, 1983, Chap. 6.
2. F. Helfferich, inMass Transfer and Kinetics of Ion Exchange. L.Liberty and F. Helfferich, Eds., M.Nijhoff, Hague, 1983, Chap 5.