1. Bashir VS (1988) Mater Sci Forum 30:33–44
2. Pillai, PMB (2007) In: Naturally Occurring Radioactive Material (NORM V), Proceedings of an International Symposium Seville, IAEA, Vienna, 19–22 March 2007. http://www-pub.iaea.org/MTCD/publications/PDF/Pub1326_web.pdf . Accessed 21 Mar 2014
3. Khan AH, Pillai PMB, Maniyan CG, Sujatha, R, Haridasan, PP (2001). Environmental surveillance during processing of monazite for extraction of thorium and rare earths compounds. Seminar on processing and applications of rare earths in India, Munnar. http://v.pl.4.eu-norm.org/index.pdf . Accessed 21 Mar 2014
4. Sethna HN, Fareeduddin, S (1957) Treatment of monazite sands with special reference to Indian practice, Symposium on Rare Metals
5. Pillai PMB, Khan AH (2003) Radiat Prot Environ 26:523–532