1. Ab Majid, M. S. Yasir, R. Yahaya, in Indicators of Sustainable Development: Assessing Changes in Environmental Conditions, A. Latif, J. J. Periera, A. Hexri Adnan (Eds), In stitute for Environment and Development (LESTARI) UKM, ISBN 983-9444-58-1, 2004, p. 213.
2. M. J. Azlina, B. Ismail, M. S. Yasir, S. H. Sakuma, M. K. Khairuddin, Appl. Radiation Isotopes, 58 (2003) 413.
3. M. S. Yasir, I. Bahari, A.R. Sahibin, D. S Abd Rahim, H. Abdul Rahman, Nucl. Sci. J. Malaysia, 19 (2001) 50.
4. M. S. Yasir, A Ab Majid, R. Yahaya, W. M. W. Husain, in: Analytical Chemistry: Application and Current Issues, ZAINI B. ASSIM et al. (Ed), UNIMAS, ISBN 983-9257-33-1, 2003, p. 149.
5. Unscear, United Nation Scientific Committee on the Effects of Atomic Radiation, Ionizing Radiation: Sources and Biological Effects, United Nations, New York, 1982