1. X-ray study of the Cu–S system;Djurle;Acta Chem. Scand.,1958
2. Distribution of atoms in high chalcocite, Cu2S;Burger;Science,1963
3. Crystal structure of low chalcocite;Evans;Nature,1971
4. Copper coordination in low chalcocite and djurleite and other copper rich sulfides;Evans;Am. Mineral.,1981
5. Crystal and twin structure of digenite, Cu9Se5;Donnay;Am. Mineral.,1958