1. J.O. Arnold, “The Physical Influence of Elementson Iron,”J. Iron Steel Inst., 45, 107–155 (1894). (Magnetism; Experimental)
2. J.E. Stead, “Iron and Phosphorus,”J. Iron _ Steel Inst., 58, 60–155 (1900). (Equi Diagram; Experimental)
3. E. Gercke, “Experimental Thermal and Metallographic Investigation on the System Iron Phosphorus,”Metallurgie, 5(20), 604–609 (1908) in German. (Equi Diagram; Experimental; #)
4. B. Saklatwalla, “Constitution of the Iron and Phosphorous Compounds,”J. Iron Steel Inst., 77, 92–103 (1908);Metallurgie, 5(11), 331–336 (1908) in German. (Equi Diagram; Experimental; #)
5. H. Le Chatelier and S. Wologdine, “Phosphide of Iron,”Compt. Rend., 149, 709–714 (1909) in French. (Equi Diagram, Magnetism; Experimental)