9Ruuge E K,Rusetski A N.Magnetic fluids as drug carriers:Targeted transport of drugs by a magnetic field[J].J Magn Magn Mater,1993,122:335-339.
10Grzeta B,Ristic M,Nowik I,et al.Formation of nanocrystalline magnetite by thermal decomposition of iron choline citrate[J].Journal of Alloys and Compounds,2002,334:304-312.