1. Frueh, A.J., The Crystallography of Silver Sulfide Ag2S, Z. Kristallogr., 1958, vol. 110, pp. 136–144.
2. Jabrailova, G.A. and Asadov, Yu.G., Structural Transformations of Ag2S, Izv. Akad. Nauk SSSR, Neorg. Mater., 1977, vol. 13, no. 3, pp. 423–425.
3. Howard, T. and Evans, H., The Crystal Structures of Low Chalcocite and Djurleite, Z. Kristallogr., 1979, vol. 150, pp. 299–320.
4. Asadov, Yu.Q., Jafarov, K.M., and Gasymov, G.B., Structural Transformations in Cu2−x S and Cu2−x InS Crystals, Phase Transitions, 1986, vol. 7, pp. 281–303.
5. Belov, N.V. and Butuzov, V.A., Structure of High Chalcocite, Cu2S, Dokl. Akad. Nauk SSSR, 1964, vol. 54, no. 8, pp. 717–720.