1. The Iron Oxides Structure, Properties, Reactions;Cornell,1996
2. Magnetic materials for recording: An overview with special emphasis on particles (invited)
3. L.M. Bennetch, H.S. Greiner, K.R. Hancock, M. Hoffman, U. S. Patent 3904540, 1975.
4. The preparation of magnetic iron oxide
5. H. Kopke, M. Ohlinger, W. Grau, E. Schoenafinger, H.H. Schneehage, U. S. Patent 4059716, 1977.