X-ray Absorption Spectroscopy and Mossbauer Spectroscopy Studies of Superparamagnetic ZnFe2O4 Nanoparticles - Blanco-Gutierrez, V.; Jimenez-Villacorta, F.; Bonville, P.; Torralvo-Fernandez, Maria J.; Saez-Puche, R.; (Journal Of Physical Chemistry c, 2011)