1. NORM from the monazite cycle and from the oil and gas industry: Problems and tentative solutions;Paschoa,2009
2. Precious metals – gold;Burnett,1998
3. The monazite cycle in Brazil: Past, present, and future;Paschoa,1994
4. Production of titanium oxide;McNulty,2008
5. Evaluation of Guidelines for Exposures to Technologically Enhanced Naturally Occurring Radioactive Materials;National Academy of Sciences – National Research Council (NAS-NRC),1999