@misc{indiciaeca019155e97d,
  title = {Stable periodic orbits about the sun perturbed earth-moon triangular points.},
  author = {Carpenter, L. and Kolenkiewicz, R.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680055699},
  note = {Source identifier: 19680055699}
}