1. Buffle, J. 1988.Complexation Reactions in Aquatic Systems: An Analytical Approach, Chap. 4, p. 146. Ellis Horwood, Chichester.
2. Clark, S.B. and Choppin, G.R. 1996. A comparison of the dissociation kinetics of rare earth element complexes with synthetic polyelectrolytes and humic acid. In: Gaffney, J.S., Marley, N.A. and Clark, S.B. (eds.),Humic andfulvic acids. Isolation, Structure and Environmental Role, ACS Symposium Series no. 651, pp. 207–219.
3. Crea, F., De Stefano, C., Gianguzza, A., Pettignano, A., Piazz-ese, D. and Sammartano, S. Acid-base properties of synthetic and natural polyelectrolytes: experimental results and models for the dependence on different aqueous media. (work in progress).
4. Daniele, P.G., De Robertis, A., De Stefano, C. and Sammartano, S. 1991. Ionic Strength Dependence of Formation Constants. XIII. A Critical Examination of Preceding Results. In: Alegret, S., Arias, J.J., Barcelo, D., Casal, J. and Router, G. (eds.),Miscellany of scientific papers offered to Enric Casassas, pp. 121 –126. Barcelona, Spain.
5. De Stefano, C., Mineo, P., Rigano, C. and Sammartano, S. 1997. Computer tools for the speciation of natural fluids. In: Gianguzza, A., Pelizzetti, E. and Sammartano, S. (eds.),Marine Chemistry–An Environmental Analytical Chemistry Approach, pp. 71–83. Kluwer, Amsterdam.