@article{articlee03080d4,
title   = {Piezoelectrets from thermo-formed bubble structures of fluoropolymer-electret films},
author = {Altafim, Ruy Alberto Corrêa and Basso, Heitor Cury and Altafim, Ruy Alberto Pisani and Lima, Leandro and Aquino, Claudio Vara de and Gonçalves Neto, Luiz and Gerhard-Multhaupt, Reimund},
year = {2006},
journal   = {IEEE Transactions on Dielectrics and Electrical Insulation}
}