1. WATEQ, A computer program for calculating chemical equilibria of natural waters;Truesdell;J. Res. U.S. Geol. Surv.,1974
2. MINEQL – a computer program for the calculation of chemical equilibrium compositions of aqueous systems;Westall,1976
3. PHREEQE – a computer program for geochemical calculations;Parkhurst,1980
4. PHRQPITZ – a computer program incorporating Pitzer's equations for calculation of geochemical reactions in brines;Plummer,1988
5. Thermodynamic and Mathematical Concepts of CHESS, Technical Report no. LHM/RD/98/39;van der Lee,1998