Electrical network models of one-and multidimensional ferroelectret structures with open tubular channels - Altafim, Ruy Alberto Corrêa; Carvalho, Felipe J. de; Assagra, Yuri A. O.; Borges, Ben-Hur Viana; Altafim, Ruy Alberto Pisani (IEEE Transactions on Dielectrics and Electrical Insulation, 2018)