1. L.G. Berry, B. Mason, Mineralogy: Concepts, Descriptions, Determinations, W.H. Freeman and Company, San Francisco, 1959, pp. 321–323.
2. A. Betekhtin, A Course of Mineralogy, Translated from Russian by A. Agol, Peace Publishers, Moscow, 1964, pp. 197–199.
3. Study on sulfur vaporization from covellite (CuS) and anilite (Cu1.75S)