Stallybrass, C., Schneider, A., & Sauthoff, G. (2005). The strengthening effect of (Ni, Fe)Al precipitates on the mechanical properties at high temperatures of ferritic Fe–Al–Ni–Cr alloys. Intermetallics, 13(12), 1263-1268. doi:10.1016/j.intermet.2004.07.048.