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	year = {2015}
}

@misc{etsi-gsm,
	author = {ETSI},
	month = may,
	organization = {European Telecommunications Standards Institute},
	title = {Digital cellular telecommunications system (Phase 2+); Full rate speech; Transcoding; ETS 300 961},
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@online{all-pole-resonance,
	author = {Kim, Hyung-Suk},
	organization = {Center for Computer Research in Music and Acoustics, Stanford University},
	title = {Linear Predictive Coding is All-Pole Resonance Modeling},
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	year = {2014}
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@article{quefrency,
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	doi = {10.1109/MSP.2004.1328092},
	journal = {Signal Processing Magazine, IEEE},
	month = {10},
	pages = {95--106},
	title = {From Frequency to Quefrency: A History of the Cepstrum},
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@online{source-filter-macquaire,
	author = {Mannell, Robert},
	month = mar,
	organization = {Department of Linguistics, Macquarie University},
	title = {Source-Filter Theory of Speech Production},
	url = {https://www.mq.edu.au/about/about-the-university/faculties-and-departments/medicine-and-health-sciences/departments-and-centres/department-of-linguistics/our-research/phonetics-and-phonology/speech/acoustics/acoustic-theory-of-speech-production/source-filter-theory},
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@online{max-min,
	author = {{Whitman College}},
	title = {Maxima and Minima},
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@online{islocalmax,
	author = {{MathWorks}},
	organization = {MathWorks},
	subtitle = {Find local maxima},
	title = {islocalmax},
	url = {https://www.mathworks.com/help/matlab/ref/islocalmax.html}
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@online{aalto-fundamental-freq,
	author = {B{\"a}ckstr{\"o}m, Tom},
	month = aug,
	organization = {Aalto University},
	title = {Fundamental frequency (F0)},
	url = {https://wiki.aalto.fi/pages/viewpage.action?pageId=149890776},
	year = {2020}
}