Bert Rust, Denis Donnelly. The fast Fourier transform for experimentalists. Part III. Classical spectral analysis. Computing in Science and Engineering, 7(5):74-78, 2005. [doi]
@article{RustD05,
  title = {The fast Fourier transform for experimentalists. Part III. Classical spectral analysis},
  author = {Bert Rust and Denis Donnelly},
  year = {2005},
  doi = {10.1109/MCSE.2005.103},
  url = {http://doi.ieeecomputersociety.org/10.1109/MCSE.2005.103},
  researchr = {https://researchr.org/publication/RustD05},
  cites = {0},
  citedby = {0},
  journal = {Computing in Science and Engineering},
  volume = {7},
  number = {5},
  pages = {74-78},
}