1. H. Remy, Lehrbuch der Anorganichen Chemie, Akademische Verlag-geselschaft Geest und Probig K.-G., Leipzig, 1960.
2. N.V. Petrovskaya (Ed.), Supergene Iron Oxides, Science, Moskow, 1975.
3. Morphological Properties of α-FeOOH, γ-FeOOH and Fe3O4 Obtained by Oxidation of Aqueous Fe(II) Solutions
4. D.G. Kleschov, A.I. Sheinkman, K.N. Pletnev, The Effect of the Environment on Phase and Chemical Transitions in Dispersed Systems, Urals Dept. USSR Academy of Sciences, Sverdlovsk, 1990.
5. Conditions for the Formation of Fe3O4by the Air Oxidation of Fe(OH)2Suspensions.