1. R. Masse, H. Métivier and R. Guillaumat, Colloq. Int. CNRS, no. 230, Physicochimie et cristallographie des apatites d'intérêt biologique, Paris 1973, ed. CNRS (Paris, 1975) p. 441.
2. J.H. Marshall, Phys. Med. Biol. 13 (1968) 15.
3. C. Kellershohn, J.N. Rimbert, D. Fortier and M. Mazière, J. Phys. Colloq. 40 (1979) C2–505.
4. S. Ofer, I. Nowik and S.G. Cohen, in: Chemical applications of Mössbauer spectroscopy, ed. V.I. Goldanskii and R.H. Herber (Academic Press, New York and London, 1968) p. 427.
5. H.H. Wickman, Proc. Conf. on hyperfine structure and nuclear radiations, Asilomar, 1967, ed. E. Matthias and D.A. Shirley (North-Holland, Amsterdam, 1968) p. 928.