1. Extractive Metallurgy of Rare Earths;Krishnamurthy,2015
2. Synthesis, Structure, and Properties of Monazite, Pretulite, and Xenotime
3. SMM Rare Earth Oxideshttps://www.metal.com/price/Rare%20Earth/Rare-Earth-Oxides
4. SMM Concentratehttps://www.metal.com/price/Rare%20Earth/Concentrate
5. Hydrometallurgy in Extraction Processes;Gupta,1990