00391nas a2200133   4500008004100000245004100041210004100082260001900123300001200142100002100154700001800175700001900193856004500212       1986                        eng d00aPhonetic universals in vowel systems0 aPhonetic universals in vowel systems  bAcademic Press  a13–441 aLindblom, Björn1 aOhala, J., J.1 aJaeger, J., J.  uhttp://scripta-bulgarica.eu/en/node/3043