Makreski, Petre, Gligor Jovanovski, Tomče Runčevski, and Radojko Jaćimović. 2011. “Simple and Efficient Method for Detection of Traces of Rare Earth Elements in Minerals by Raman Spectroscopy Instrumentation”. Macedonian Journal of Chemistry and Chemical Engineering 30 (2):241-50. https://doi.org/10.20450/mjcce.2011.39.