Chappuis, Thierry, et al. “Influence of the Hydrogen Reduction Time and Temperature on the Morphology Evolution and Hematite Magnetite Conversion of Spindle-Type Hematite Nanoparticles: FH – HES”. CHIMIA, vol. 65, no. 12, Dec. 2011, p. 979, doi:10.2533/chimia.2011.979.