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3. The Y2Se3‒La2Se3‒GeS2 system at 770 K;Smitiukh;J. Alloys Compd.,2016
4. Erbium sulfide-Delta;Landa-Canovas;J. Alloys Compd.,2001
5. Lanthanum (II) sulfide;Basancon;Mater. Res. Bull.,1969