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M. Jackson (2000). „Magnetism of Rare Earth”(PDF). The IRM quarterly. 10 (3): 1. Архивирано из оригинала(PDF) 12. 7. 2017. г. Приступљено 25. 2. 2014.
web.archive.org
M. Jackson (2000). „Magnetism of Rare Earth”(PDF). The IRM quarterly. 10 (3): 1. Архивирано из оригинала(PDF) 12. 7. 2017. г. Приступљено 25. 2. 2014.