@misc{indiciaeea236735b1b7,
  title = {A statistical analysis of some non-linear optical effects},
  author = {O'Neill, E. L. and Estes, L. and Narducci, L. and Clark, W.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19710026372},
  note = {Source identifier: 19710026372}
}