1. Derr, E. L. and C. H. Deal; “Analytical Solutions of Groups: Correlation of Activity Coefficients through Structural Group Parameters,” I. Chem. E. Symposium Series, vol. 32, chapter 3, p.40, Institution of Chemical Engineers, London, U.K. (1969)
2. A modified UNIFAC model. 2. Present parameter matrix and results for different thermodynamic properties
3. Gmehling, J., J. Rarey and J. Menke; Dortmund Data Bank Software and Separation Technology GmbH, Oldenburg, Germany, www.ddbst.com (2008)
4. Vapor-liquid equilibria by UNIFAC group contribution. 5. Revision and extension