Widder DJ, Greif WL, Widder KJ, Edelman RR, Brady TJ: Magnetite albumin microspheres: a new MR contrast material. AJR. American Journal of Roentgenology, February 1987, 148. vsk, nro 2, s. 399–404. PubMed:3492120doi:10.2214/ajr.148.2.399
Weissleder R, Elizondo G, Wittenberg J, Rabito CA, Bengele HH, Josephson L: Ultrasmall superparamagnetic iron oxide: characterization of a new class of contrast agents for MR imaging. Radiology, May 1990, 175. vsk, nro 2, s. 489–93. PubMed:2326474doi:10.1148/radiology.175.2.2326474
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Page 26 in: Weishaupt, Dominik; Koechli, Victor D.; Marincek, Borut: How does MRI work?: An Introduction to the Physics and Function of Magnetic Resonance Imaging. Springer Science & Business Media, 2013. ISBN 978-3-662-07805-1
Widder DJ, Greif WL, Widder KJ, Edelman RR, Brady TJ: Magnetite albumin microspheres: a new MR contrast material. AJR. American Journal of Roentgenology, February 1987, 148. vsk, nro 2, s. 399–404. PubMed:3492120doi:10.2214/ajr.148.2.399
Weissleder R, Elizondo G, Wittenberg J, Rabito CA, Bengele HH, Josephson L: Ultrasmall superparamagnetic iron oxide: characterization of a new class of contrast agents for MR imaging. Radiology, May 1990, 175. vsk, nro 2, s. 489–93. PubMed:2326474doi:10.1148/radiology.175.2.2326474