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2. Asanti, P., Kohlmeyer, E.J., “On the Thermal Analysis of Compounds of Iron and Cobalt with Oxygen and Sulphur” (in German), Z. Anorg. Chem., 265, 90–98 (1951) (Experimental, Phase Diagram, 24)
3. Vogel, R., Hillner, G.F., “Phase Diagram of Iron-Iron Sulphide-Cobalt Sulphide-Cobalt” (in German), Arch. Eisenhuettenwes., 24(3–4), 133–141 (1953) (Experimental, Phase Diagram, Phase Relations, #, *, 13)
4. Moleva, N.G., Kusakin, P.S., Vetrenko, E.A., Diev, N.P., “About Crystallization of Alloys in the FeS-Co4S3 System” (in Russian), Zh. Prikl. Khim., 30(9), 1402–1405 (1957) (Experimental, Phase Diagram, 7)
5. Moleva, N.G., Kusakin, P.S., Vetrenko, E.A., Diev, N.P., “Phase Diagram of the Fe-Co-S System” (in Russian), Zh. Neorg. Khim., 3(4), 904–910 (1958) (Experimental, Phase Diagram, * 15)