@misc{indiciaece38fe348598,
  title = {Mode localization in multi-span beams},
  author = {Lust, S. D. and Friedmann, P. P. and Bendiksen, O. O.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19900039743},
  note = {Source identifier: 19900039743}
}