1. Owen, M., in Biochemistry and Physiology of Bone (edit. by Bourne, G. H.), second ed., 271 (Academic, New York, 1971).
2. Scott, B. L., J. Cell Biol., 35, 115 (1967).
3. Trueta, J., in Radioisotopes and Bone (edit. by Lacroix, P., Budy, A. M., and McLean, F. C.), 371 (Blackwell, Oxford, 1962).
4. Tonna, E. A., J. biophys. biochem. Cytol., 9, 814 (1961).
5. Simmons, D. J., Clin. Orthop., 26, 176 (1963).