L. Babes, B. Denizot, G. Tanguy, J.J. Le Jeune, P. Jallet (1999). Synthesis of Iron Oxide Nanoparticles Used as MRI Contrast Agents: A Parametric Study. Journal of Colloid and Interface Science 212 (2): 474–482. doi: 10.1006/jcis.1998.6053. PMID 10092379.
M. Hanzlik, C. Heunemann, E. Holtkamp-Rötzler, M. Winklhofer, N. Petersen, G. Fleissner (2000). Superparamagnetic Magnetite in the Upper Beak Tissue of Homing Pigeons. BioMetals 13 (4): 325–331. doi: 10.1023/A:1009214526685. PMID 11247039.