Laminated tubular-channel ferroelectret systems from low-density polyethylene films and from fluoroethylene-propylene copolymer films: a comparison - Altafim, Ruy Alberto Pisani; Rychkov, Dmitry; Wirges, Werner; Gerhard-Multhaupt, Reimund; Basso, Heitor Cury; Altafim, Ruy Alberto Corrêa; Melzer, Martin (IEEE Transactions on Dielectrics and Electrical Insulation, 2012)