Boersma, P., Weenink D. 2008-2009, Praat 4.4-5.1 [Computer program]. http://www.praat.org/.
Lehiste, I. 1960, Segmental and Syllabic Quantity in Estonian. - American Studies in Uralic Linguistics, Bloomington (UAS 1), 21-82.
Lehiste, I. 1997, Search for Phonetic Correlates in Estonian Prosody. - Estonian Prosody: Papers from a Symposium, Tallinn, 11-35.
Liiv, G. 1961, Eesti keele kolme vältusastme vokaalide kestus ja meloodiatüübid. - KK, 412-424, 480-490.
Markusa, D. 1991, Syllable Tonemes in Latvian. - Proceedings of the XIIth International Congress of Phonetic Sciences, August 19-24, 1991, Aix-en-Provence, France, Volume 2/5, 242-245.
Pajupuu, H., Viitso, T.-R. 1986, Livonian Polyphthongs. - Estonian Papers in Phonetics 1984-1985, Tallinn, 96-130.
Ross, J., Lehiste, I. 2001, The Temporal Structure of Estonian Runic Songs, Berlin-New York.
Teras, P., Tuisk, T. 2009, The Characteristics of Stød in Livonian. - Nordic Prosody. Proceedings of the Xth Conference, Helsinki 2008, Frankfurt am Main-Berlin-Bern-Bruxelles-New York-Oxford-Wien, 217-226
Vihman, M. M. 1971, Livonian Phonology, with an Appendix on Stød in Danish and Livonian. Dissertation Submitted in Partial Satisfaction of the Requirements for the Degree of Doctor of Philosophy in Linguistics in the Graduate Division of the University of California, Berkeley (MS).