@misc{gstrang,
	title = {Linear Algebra and Its Applications, by Gilbert Strang (chapter 3.5)},
	howpublished = "\url{https://archive.org/details/linearalgebrait00stra}",
}
@misc{tpornin,
	title = {{Thomas Pornin} mathoverflow answer},
	howpublished = "\url{https://crypto.stackexchange.com/a/63616}",
}
@misc{rfateman,
	title = {notes by {Prof. R. Fateman}},
	howpublished = "\url{https://www.csee.umbc.edu/~phatak/691a/fft-lnotes/fftnotes.pdf}",
}
@misc{fftrs,
	title = {fft-rs},
	howpublished = "\url{https://github.com/arnaucube/fft-rs}",
}
@misc{fftsage,
	title = {fft-sage},
	howpublished = "\url{https://github.com/arnaucube/math/blob/master/fft.sage}",
}