@article{DT058,
   Author = {Wang, Y. and Bertsch, G. F. and Tomanek, D.},
   Title = {Hyperpolarizability of the C$_{60}$ fullerene cluster},
   Journal = {Z. Phys. D: Atoms, Molecules and Clusters},
   Volume = {25},
   Number = {2},
   Pages = {181--184},
   Year = {1993},
   url = {http://dx.doi.org/10.1007/BF01450173},
   doi = {10.1007/BF01450173}
 }