1. Radioactive concentrations of the Livingston Island soils (Antarctica) dosimetry considerations;Baeza;Appl. Radiat. Isot.,1994
2. Brazilian Academy of Sciences (Academia Braxileira de Ciencias), 1997. Proceedings of the International Symposium on Areas of High Natural Radioactivity, Rio de Janeiro, Brazil.
3. Ching-Jiang Chen, Pao-Shan Weng, Tich-Chi Chu, 1993. Evaluation of natural radiation in houses built with Blach Schist. Health Phys. 64, 74–78.
4. Hanson, G.P., Komarov, E., 1983. Health effects in residents of high background radiation regions. In: Biological Effects of Low-Levels Radiation. Proceedings of an International Symposium on the Effects of Low-Level Radiation, Vienna, IAEA; IAEA-SM-266/81, 1983, pp. 211–230.
5. Measurement of radioactivity levels in the Nile Delta and Middle Egypt;Ibrahiem;Health Phys.,1993