@article{article67e1d4b9,
title   = {Comparative Analysis of the Closed Quotient for Lip and Tongue Trills in Relation to the Sustained Vowel /ε/},
author = {Cordeiro, Gislaine Ferro and Montagnoli, Arlindo Neto and Nemr, Nair Katia and Menezes, Marcia Helena Moreira and Tsuji, Domingos Hiroshi},
year = {2012},
doi = {10.1016/j.jvoice.2010.07.004},
journal   = {Journal of voice}
}