1. Besson P, Guerin J, Brun P and Bakes M 1977 US Pat. 4021,531
2. Blumenthal W B 1958The chemical behaviour of zirconium (New York: Van Nostrand)
3. Bradley D C and Wardlaw W J 1951J. Chem. Soc. 280–285
4. Bromberg M L 1958 US Pat. 2,852,446
5. Brun P, Thouvenin P and Moulin L 19826th Int. Conf. Nucl. Appl. Zr (Vancouver: ASTM)