1. Economical Mathematical Model for Improving Power Factor in Industry;Sharafeddine,1994
2. Effect of Improving P.F. on the Cost of Generation in Electrical Energy;Al-Khateeb,1994
3. Economy and Prospective;Gardel,1981
4. The Electric Supply of Industrial Enterprises, in Russian;Fedorov,1979
5. Electrical Power Distribution System Engineering;Gonen,1986