“Perbandingan Gugus Fungsi dan Morfologi Permukaan Karbon Aktif dari Pelepah Kelapa Sawit Menggunakan Aktivator Asam Fosfat (H3PO4) dan Asam Nitrat (HNO3): Comparison of Functional Groups and Morphologies of Activated Carbon Surfaces from Palm Tree Fronds Using Phosphoric Acid (H3PO4) and Nitric Acid (HNO3) Activators” (2018) Talenta Conference Series: Science and Technology (ST), 1(2), pp. 204–208. doi:10.32734/st.v1i2.299.