1. Brézis, Singularities of liquid crystals, To appear in the Proceedings-I.M.A. Workshop on the Theory and Applications of Liquid-Ericksen J., Kinderlehrer D. (eds) Crystals, January 1985
2. Brézis, H., Coron, J. M.: Large solutions for harmonic maps in two dimensions. Commun. Math. Physics,92, 203?215 (1983)
3. Brézis, H., Coron, J. M., Lieb, E.: Minimization problems with point defects, In preparation
4. De Giorgi, E.: Sulla differenziabilita e l'analiticita delle estremali degli integrali multipli regolari. Mem. Acad. Ser. Torino143, 25?43 (1957)
5. De Gennes, P.: The physics of liquid crystals. Oxford: Clarendon Press 1974