[21] S. A. Mikhailov. Quantum theory of third-harmonic generation in graphene. Phys. Rev. B (erratum), 91, 039904(2014).
[23] J. L. Cheng, N. Vermeulen, J. E. Sipe. Third-order nonlinearity of graphene: effects of phenomenological relaxation and finite temperature. Phys. Rev. B (erratum), 93, 039904(2016).
[50] K. Ziegler. Robust transport properties in graphene. Phys. Rev. Lett., 97, 266802(2006).
Measurement of the optical conductivity of graphene. Phys. Rev. Lett., 101, 196405(2008).
[63] E. D. Palik, G. Ghosh. Handbook of Optical Constants of Solids(1998).