Synergic effect of graphene nanoplatelets and carbon nanotubes on the electrical resistivity and percolation threshold of polymer hybrid nanocompositesM. Haghgoo, R. Ansari and M. K. Hassanzadeh-AghdamEur. Phys. J. Plus, 136 7 (2021) 768DOI: https://doi.org/10.1140/epjp/s13360-021-01774-5