1. Aksoy, M., Bird, G. W. G., Lehmann, H., Mourant, A. E., Thein, H., and Wickremasinghe, R. L., J. Physiol., 130, 56P (1955).
2. Lehmann, H., Storey, P., and Thein, H., Brit. Med. J., i, 544 (1956).
3. Na-Nakorn, S., Minnich, Virginia, and Chernoff, A. I., J. Lab. Clin. Med., 47, 490 (1956).
4. Lehmann, H., and Bhagwan Singh, R., Nature, 178, 695 (1956).
5. Lie-Injo, Luan Eng, Nature, 176, 458 (1955).