1. T.A. Jones, Avoiding the pitfalls of power factor correction, Pure Power Magazine, April 1999.
2. R.E.J. Putman, Designing energy management systems, PIMA Magazine, August 1984.
3. R.E. Putman, F.C. Huff, J.K. Pal, Optimal reactive power control for industrial power networks, IEEE Transactions on Industry Applications, 35 (1999).
4. J.E. Hanway, R.E. Putman, Optimizing reactive power distribution in an industrial network, US Patent No. 5,081,591, 14 January 1992.
5. Electric Systems Theory;Elgerd,1971