@article{article5917cf76,
title   = {Chaos tool implementation for non-singer and singer voice comparison: preliminar study},
author = {Dajer, Maria Eugenia and Pereira, José Carlos and Maciel, Carlos Dias},
year = {2007},
doi = {10.1088/1742-6596/90/1/012082},
journal   = {Journal of Physics : conference series}
}