Semenov, E., H. Sørensen, M. Bessmertnaja, and L. Novorossova. “Chalcothallite - A New Sulphide of Copper and Thallium from the Ilímaussaq Alkaline Intrusion, South Greenland”. Bulletin Grønlands Geologiske Undersøgelse, vol. 68, Oct. 1967, pp. 12-37, doi:10.34194/bullggu.v68.6606.