1. Helfferich, F.G. The Promises of Ion Exchange, Chem.Eng.Prog. 73(1977)53–55
2. Rodrigues, A.E. Ion Exchange, AIChEMI Modular Instruction, Series B, module B5.4 (in press)
3. Gold, H. and C. Calmon. Ion Exchange-Present Status, Needs and Trends. 70th Annual AIChE Meeting, New York(1977)
4. Rodrigues, A.E. Modeling of Percolation Processes in Percolation Processes: Theory and Applications, edited by Rodrigues, A. and D. Tondeur (Sijthoff & Noordhoff, 1981)
5. Tondeur, D. Théorie des colonnes d’échange d’ions, Thèse, Univ. Nancy (1969)