1. The physics of liquid crystals;de Gennes,1974
2. Dynamic Ginzburg-Landau Theory for the Liquid-Solid Phase Transition
3. D.R. Nelson and J. Toner, Harvard University preprint.
4. The fluctuation theory of phase transitions;Patashinskii,1979
5. L.D. Landau and E.M. Lifshitz, Theory of elasticity (Pergamon, Oxford).