N-Doped rGO-like carbon prepared from coconut shell: structure and specific capacitance by Khambali, Imam, Priyanto, Budhi, Asih, Retno, Anjelh Baqiya, Malik, Mahyiddin Ramli, Muhammad, Huda Osman, Nurul, Tunmee, Sarayut, Nakajima, Hideki, Triwikantoro, ., Zainuri, Mochamad, Darminto, .