1. Nerve Growth Factor and its Antiserum (edit. by Zaimis, E.) (Athlone Press, London, 1972).
2. Levi-Montalcini, R., Meyer, H., and Hamburger, V., Cancer Res., 14, 49 (1954).
3. Pearce, F. L., Banthorpe, D. V., Cook, J. M., and Vernon, C. A., Eur. J. Biochem., 32, 569 (1973).
4. Levi-Montalcini, R., and Angeletti, P. U., Physiol. Rev., 48, 534 (1968).
5. Levi-Montalcini, R., and Angeletti, P. U., in Nerve Growth Factor and its Antiserum (edit. by Zaimis, E.), 46 (Athlone Press, London, 1972).