Makhsin, Siti Rabizah, Mohd Zali, Muhammad Izham Hakimi, Abdul Rani, Rozina, Saad, Nor Hayati, AND Ayub, Muhammad Azmi. " Modifies Hummer’s Method of Graphene Oxide Nanostructures for Fibre Optic Sensors Application" Scientific Research Journal [Online], Volume 18 Number 1 (28 February 2021)