1. Vogel, R., Reinbach, R., “The System Iron-Chromium-Chromium Sulphide-Iron Sulphide” (in German), Arch. Eisenhuettenwes., 11, 457–462 (1938) (Experimental, Phase Diagram, #, *, 7)
2. Lundqvist, D., “The Crystal Structure of Daubreelite”, Arkiv Kemi, Mineral. Geol., 17B(12), 1–4 (1944) (Experimental, Crys. Structure, 5)
3. Jaenecke, E., “S-Fe-Cr” (in German) in “Kurzgefasstes Handbuch aller Legierungen”, Winter Verlag, Heidelberg, 728–730 (1949) (Review, Phase Diagram, 1)
4. Vogel, R., Fuelling, W., “Alloys with Sulphur in Foundry, Metallurgy and Cosmic Physics” (in German), Z. Metallkd., 42(7), 202–206 (1951) (Review, Phase Relations, 6)
5. Lotgering, F.K., “On the Ferromagnetism. of Some Sulphides and Oxides. II Oxygen and Sulphur Spinels Containing Chromium (MCr2O4 and MCrS4)”, Phillips Res. Rep., 11, 218–249 (1956) (Experimental, Crys. Structure, Magn. Prop., 21)