Rodríguez E, Roig A, Molins E, Arús C, Quintero MR, Cabañas ME, Cerdán S, Lopez-Larrubia P, Sanfeliu C. In vitro characterization of an Fe(8) cluster as potential MRI contrast agent. NMR Biomed. 2005 Aug;18(5):300-7. doi: 10.1002/nbm.959. PMID: 15912577.