1. Ahrens TJ, Anderson DL, and atRingwood AE (1969) Equations of state and crystal structures of high-pressure phases of shocked silicates and oxides. Rev. Geophys., 7:667–
2. Akimoto S, and Ida Y (1966) High-pressure synthesis of Mg2Si04 spinel. Earth Planet. Sci. Letters, 1:358
3. Al’tschuler LV et al (1958) Zurn. Eksp. Tear. Fiz., 36:606.
4. Al’tschuler LV, and Kormer SB (1961) On the internal constitution of the Earth. Bull. A cad. Sci. U.S.S.R., Geophys. Ser. (English trans.), pp.18–21
5. Bernal JD (1936) Hypothesis on 20° discontinuity. Observatory, 59:268