@misc{indiciae754708977163,
  title = {Evidence for sinusoidal phase modulation in small self-trapped filaments.},
  author = {Grieneisen, P. H. and Lifsitz, J. R.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19690036200},
  note = {Source identifier: 19690036200}
}