TY - JOUR IS - 4 JO - BioMetals PY - 2000 SN - 0966-0844 VL - 13 AU - Hanzlik M AU - Heunemann C AU - Holtkamp-Rotzler E AU - Winklhofer M AU - Petersen N AU - Fleissner G DO - 10.1023/a:1009214526685 LA - en N1 - FEMU ID: 9897; EMF-Portal URL: https://www.emf-portal.org/en/article/9897 SP - 325-331 TI - Superparamagnetic magnetite in the upper beak tissue of homing pigeons ER -