@misc{indiciae9f3d6a19b27f,
  title = {Circularly polarized antennas with controlled radiation patterns},
  author = {Prigoda, B. A. and Guryev, V. A. and Ulyanin, N. S. and Kalugin, N. N.},
  year = {1974},
  url = {https://ntrs.nasa.gov/citations/19750002929},
  note = {Source identifier: 19750002929}
}