@inbook {Lindblom1986,
	title = {Phonetic universals in vowel systems},
	booktitle = {Experimental phonology},
	year = {1986},
	pages = {13{\textendash}44},
	publisher = {Academic Press},
	organization = {Academic Press},
	author = {Lindblom, Bj{\"o}rn},
	editor = {Ohala, J. J. and Jaeger, J. J.}
}
