Large third-order nonlinear optical properties of C70 fullerene in the infrared regime - Yang, Shao-Chen; Gong, Qihuang; Xia, Zongju; Zou, Y. H.; Wu, Y. Q.; Qiang, D.; Sun, Y. L.; Gu, Z. N. (Springer, 1992)
http://dx.doi.org/10.1007/BF00348613
Keywords: U