1. Organic Solvents, Physical Properties and Methods of Purification;Weissberger,1955
2. Dielectric Parameters of Pure Liquids;Ahadov,1999
3. Handbook on Dipole Moments;Osipov,1971
4. Tetramethylurea as a solvent and reagent;Lüttringhaus;Angew. Chem.,1964
5. Organic Solvents;Riddick,1970