1. Burns RG, Burns VM (1984) Crystal chemistry of meteoritic hibonites. J Geophys Res 89: C313-C321
2. Chacko T, Ravindra Kumar GR, Newton RC (1987) Metamorphic P-T conditions of the Kerala (South India) khondalite belt, a granulite facies supracrustal terrain. J Geol 95: 343?358
3. Crawford A (1969) Reconnaissance Rb-Sr dating of Precambrian rocks of southern Peninsula India. J Geol Soc India 10: 117?166
4. Curien H, Guillemin C, Orcel J, Sternberg M (1956) La hibonite, nouvelle espece minerale. C R Acad Sci Paris 242: 2845?2847
5. Deer WA, Howie RA, Zussman J (1964) Rock forming minerals. Volume 4: Framework silicates. Longman, London, 435 pp