1. K. H. Jack, “Iron-nitrogen, iron-carbon and ironcarbon-nitrogen interstitial alloys: Their occurence in tempered martensite,” Z. Kristallogr. 158, 60–61 (1946).
2. J. P. Senateur, “Contribution a l’etude magnetique et structurale du carbure de Hägg,” Ann. Chim. (Paris), 1967(2), 103–122 (1967).
3. S. Nagakura and S. Oketani, “Structure of transition metal carbides,” Trans. Iron Steel Inst. Japan, No. 5, 265–294 (1968).
4. J. J. Retief, “Powder diffraction data and Rietveld refinement of Hägg-Carbide, χ-Fe5C2,” Powder Diffraction 14, 130–132 (1999).
5. H. E. du Plessis, J. P. R. de Villiers, and G. J. Kruger, “Redetermination of the crystal structure of Hägg-Carbide, χ-Fe5C2,” Z. Kristallogr. 222, 211–217 (2007).