1. Polar Molecules;Debye,1929
2. Dipole Behaviour and Structure;Smyth,1955
3. Dielectric Properties and Molecular Behaviour;Hill,1969
4. N.G. McCrum, B.E. Read, G. Williams, Anelastic and Dielectric Effects in Polymeric Solids, Wiley, London 1967 and Dover Publ., New York, 1991.