1. Bassler, T. and Scaff, J., 1976, Impending heart attacks, Lancet 1: 544.
2. Bethell, H. J. N., and Nixon, P. G. F., 1973, Understanding the atrial sound, Brit. Heart Jnl., 35: 229.
3. Birley, J. L. T., 1973, The effect of the environment on the individual, Proc. Roy. Soc. Med., 66: 96.
4. Brit. Med. Jnl., 1971, Editorial: The murmuring heart, 4: 125.
5. Brit. Med. Jnl., 1975, Editorial: Response to stress and ulcers, 2: 458.