Witjaksono, G. and Junaid, M. and Khir, M.H. and Ullah, Z. and Tansu, N. and Saheed, M.S.B.M. and Siddiqui, M.A. and Ba-Hashwan, S.S. and Algamili, A.S. and Magsi, S.A. and Aslam, M.Z. and Nawaz, R.  (2021) Effect of nitrogen doping on the optical bandgap and electrical conductivity of nitrogen-doped reduced graphene oxide.  Molecules, 26 (21).   ISSN 14203049