1@misc{gstrang,
 2	title = {Linear Algebra and Its Applications, by Gilbert Strang (chapter 3.5)},
 3	howpublished = "\url{https://archive.org/details/linearalgebrait00stra}",
 4}
 5@misc{tpornin,
 6	title = {{Thomas Pornin} mathoverflow answer},
 7	howpublished = "\url{https://crypto.stackexchange.com/a/63616}",
 8}
 9@misc{rfateman,
10	title = {notes by {Prof. R. Fateman}},
11	howpublished = "\url{https://www.csee.umbc.edu/~phatak/691a/fft-lnotes/fftnotes.pdf}",
12}
13@misc{fftrs,
14	title = {fft-rs},
15	howpublished = "\url{https://github.com/arnaucube/fft-rs}",
16}
17@misc{fftsage,
18	title = {fft-sage},
19	howpublished = "\url{https://github.com/arnaucube/math/blob/master/fft.sage}",
20}