@misc{indiciaeda57c4862aa3,
  title = {The probability density function for phase- difference estimates obtained from the envelopes of the sum and difference of two sine waves.},
  author = {Kendall, W. B.},
  year = {1964},
  url = {https://ntrs.nasa.gov/citations/19640040223},
  note = {Source identifier: 19640040223}
}