Mahmood Ali, Mayada, Qaidar Salim Jarjees, and Omar Mousa Ramadhan. 2005. “Preparation of Activated Carbon from the External Shell of Coconut Fruit Using Modified Carbonization and Chemical Thermal Activation”. Journal of Education and Science (JES) 17 (4):10-16. https://doi.org/10.33899/edusj.2005.82972.