1. Aragona, J., Parsons, J. R., Alexander, H. and Weiss, A. B. (1981). Clin. Orthop., 160, 268
2. Belmont, A. S., Kendall, F. M. and Nicolini, C. A. (1980). Cell Biophys., 2, 165
3. Bessman, S. P., Thomas, L. J., Kojima, H., Sayler, D. F. and Layne, E. C. (1981). Trans. Am. Soc. Art. Int. Organs, 27, 7
4. Cameron, H. U. and Federkow, D. M. (1980). Arch. Orthop. Trauma Surg., 97, 87
5. Clagett, G. P., Robinowitz, M., Maddox, Y., Langloss, J. M. and Ramwell, P. W. (1982). Surgery, 91, 87