@misc{indiciaed66353a2d497,
  title = {The Relationship Between Second-Order Nonlinear Optical Properties and Ground-State Polarization},
  author = {Bourhil, G. and Cheng, L-T. and Lee, G. and Marder, S. R. and Perry, J. W. and Perry, M. J. and Tienmann, B. G.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/20060039688},
  note = {Source identifier: 20060039688}
}