1. 1R. A. Laudise, and J. J. Gilman ; pp.252 -73 inThe Art and Science of Growing Crystals . Wiley & Sons, New York, 1963 .
2. 2F. A. Kroeger , Chemistry of Imperfect Crystals , pp.31 -78 . North-Holland Publishing, Amsterdam, 1964 .
3. 3J. B. Schroeder, R.C. Linares, and J. E. Burke ; pp.195 -216 inProgress in Ceramic Science , Vol. 4 . Pergamon, Oxford, 1966 .
4. The crystallisation of alkaline-earth metal tungstates (molybdates, chromates, and sulphates) from metal chloride melts
5. The crystallisation of alkaline-earth metal tungstates from sodium tungstate melts