Fleissner, G.; Fleissner, G.; Schuchardt, K.; Kühbacher, M.; Falkenberg, G.: High resolution μ-XRF topography of iron oxides inside sensory dendrites of avian magnetoreceptors. , 2008
http://hasyweb.desy.de/science/annual_reports/2007_report/part1/contrib/47/20273.pdf