Laurentiu Valentin Soroaga, Cecilia Arsene, Romeo Iulian Olariu. THE EVALUATION OF NA2O2 AS A SINTERING AGENT IN SOLID STATE DISSOLUTION OF POTENTIAL SECONDARY SOURCES FOR RARE EARTH ELEMENTS. SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; 21st SGEM International Multidisciplinary Scientific GeoConference Proceedings 2021, Energy and Clean Technologies, 2021, pp. 41-48. https://doi.org/10.5593/sgem2021v/4.2/s18.08