Schlappa, J., Schüßler-Langeheine, C., Chang, C. F., Ott, H., Tanaka, A., Hu, Z., et al. (2008). Direct Observation of t2g Orbital Ordering in Magnetite. Physical Review Letters, 100(2): 026406, pp. 1-4. doi:10.1103/PhysRevLett.100.026406.