References
- Berger , J. and Avron , J. 1995 . J. Chem. Soc. Faraday Trans. , 91 : 4037
- The coordinates of the atoms in these molecules may be downloaded from http://physics.technion.ac.il/∼avron
- Willmore , T. J. 1993 . Riemmannian Geometry , Oxford : (Clarendon .
- Jülicher , F. 1996 . J. de Physique , 6 : 1797
- Tersoff , J. 1992 . Phys. Rev. B , 46 : 15 546(;R. A. Jishi et al. Chem. Phys. Lett. 209, 77 (1993)
- Olk , C. H. and Heremans , J. P. 1994 . J. Mater. Res. , 9 : 259