9G. Blanchon. A new aspect of studies of reactive energy and voltage of the networks [C]. Proc. of Power Systems Computation Conference (PSCC). 1972.
10V. Arcidiacono, S. Corsi, A. Natale, C. Raffaelli. New Devolopments in the Applications of ENEL Transmission System Automatic Voltage and Reactive Control[C]. CIGRE, Report 38/ 39-06, Paris 1990.
