1. 1) Boatner, L. A. and Sales, B. C. (1988) Radioactive waste forms for the future, edited by Lutze, W and Ewing, R. C., North Holland, New York, pp. 495–563.
2. 4) Hench, L. L. and Gould, R. W. (1971) Characterization of Ceramics, Marcel/Dekker, Inc., New York, pp. 397–398.