Evan E. Bolton; Yanli Wang; Paul A. Thiessen; Stephen H. Bryant (2008). „Chapter 12 PubChem: Integrated Platform of Small Molecules and Biological Activities”. Annual Reports in Computational Chemistry. 4: 217—241. doi:10.1016/S1574-1400(08)00012-1.
The formation of Cu2S from the elements I. Copper used in form of powders, Blachnik R., Müller A., Thermochimica Acta, 361, 1-2, (2000), 31-52, . doi:10.1016/S0040-6031(00)00545-1.Недостаје или је празан параметар |title= (помоћ)