Tài liệu tham khảo

WikiPedia: Nam_châm_đất_hiếm http://www.allproducts.com/metal/micromeg/12-earth... http://www.rare-earth-magnets.com/magnet_universit... http://www.sciencedirect.com/science?_ob=ArticleUR... http://link.aip.org/link/?JAPIAU/93/8683/1 http://scitation.aip.org/getabs/servlet/GetabsServ... http://scitation.aip.org/getabs/servlet/GetabsServ... http://ieeexplore.ieee.org/iel5/20/22871/01063214.... http://www.stormingmedia.us/38/3830/A383004.html https://web.archive.org/web/20070928030209/http://...