1. I. J. Hastings, P. G. Boczar, C. J. Allan, and M. Gacesa, Proc. Sixth KAIF/KNS Annual Conf., Seoul, Korea (1991).
2. J. S. Lee, K. C. Song, M. S. Yang, K. S. Chun, B. W. Rhee, J. S. Hong, H. S. Park, and C. S. Rim, Proc. Int. Conf. on Future Nuclear Systems: Emerging Fuel Cycles and Waste Disposal Options Global’93, Seattle, Washington (1993).
3. Gronvold F. (1955). J. Inorg. Nucl. Chem. 1:357
4. Baldock P.J., Spindler W.E., Baker T.W. (1966). J. Nucl. Mater. 18:305
5. Albinati A. (1980). Acta Cryst. A 36:265