Dielectric spectroscopy of melt-extruded polypropylene and as-grown carbon nanofiber compositesA. J. Paleo, Z. Samir, N. Aribou, Y. Nioua, M. S. Martins, M. F. Cerqueira, J. Agostinho Moreira and M. E. AchourEur. Phys. J. E, 44 5 (2021) 73DOI: https://doi.org/10.1140/epje/s10189-021-00079-w