Mohd Ariff, M. S. N., Abdullah, H., & A. Jalil, S. Z. (2018). A Comparison Study of Radioactivity and Radiation Hazard Index between Legal and Illegal Cigarettes. International Journal of Integrated Engineering, 10(7). https://penerbit.uthm.edu.my/ojs/index.php/ijie/article/view/3474