Soen, O. and Sørensen, H. (1964) “The occurrence of nickel-arsenides and nickel-antimonide at Igdlúnguaq, in the Ilímaussaq alkaline massif, South Greenland”, Bulletin Grønlands Geologiske Undersøgelse. Copenhagen, Denmark, 43, pp. 1–50. doi: 10.34194/bullggu.v43.6577.