@misc{indiciaea6a34846658c,
  title = {Directivity optimization of a reflector antenna with cluster feeds - A closed-form solution},
  author = {Lam, P. T. and Lee, S.-W. and Chang, D. C. D. and Lang, K. C.},
  year = {1985},
  url = {https://ntrs.nasa.gov/citations/19860034440},
  note = {Source identifier: 19860034440}
}