1. Bates, J. A. V. andCooper, J. D. (1954). A simple electronic circuit for measuring a voltage-time integral.J. Physiol.,123, 28–29P.
2. Bendat, J. S. (1962) Interpretation and application of statistical analysis for random physical phenomena.Inst. Rad. Engrs. Trans. Bio-Med. Electron.,BME-9, 31–43.
3. Cundall, C. M., Saggerson, J. K. andShaw, G. (1959) A transistor d.c. amplifier for use in analogue computers.Proc. Inst. Electr. Engrs.,106B, Supplement 18, 1354–1364.
4. Davis, J. F. (1956)Operator's Manual for the A.M.I. Integrator System. Laboratory for Psychological Studies, McGill University, Montreal, Canada.
5. Fifer, S. (1961)Analogue Computation, Vol. 1, pp. 44–45. McGraw Hill, New York, U.S.A.