1. Group Theory of Polymers and Soft Matter Department of Applied Physics; Technische Universiteit Eindhoven; P.O. Box 513 5600 MB Eindhoven The Netherlands
2. Chair of Polymer and Crystal Physics, Physics Department; M. V. Lomonosov Moscow State University; Moscow 119991 Russia
3. Nesmeyanov Institute of Organoelement Compounds; Russian Academy of Sciences; Vavilova St. 28 Moscow 119991 Russia
4. Department of Theoretical Physics; Tver State University; Sadovyj per. 35 Tver 170002 Russia