Tài liệu tham khảo WikiPedia: Zultanite http://www.viewer.i-version.com/iversion/download.... http://www.savaskirimlioglu.com/degerlitaslar.htm http://link.springer.com/article/10.1007%2Fs00126-... http://www.zultanite.com/ http://www.edelstein-gutachten.de/aus-dem-alltag-d... //dx.doi.org/10.1007%2Fs00126-009-0262-2
