References
- Dorf, R. C., Time-Domain Analysis and Design of Control Systems (Addison-Wesley Publishing Co. Inc., 1965), ch. 2.
- Thomason, J. L., Trans. Amer. Inst. Elect. Engrs, 53 (1) (1934), 169.
- Joarder, M. K., Applied physics Qtly, 10 (1) (Sept. 1968).
- Allen, D. N. de G., Relaxation Methods (McGraw-Hill Book Co. Inc., New York), 1954.