(3) Ofgem: Electricity Distribution Price Control Review Initial Consultation (2003)
(4) K. Ikeda, H. Sugihara, and K. Tsuji: “Reduction Potential of CO2 Emission by Integrated Energy Service System in Urban Area Considering the Generation Mix of Electric Utility”, IEEJ Trans. PE, Vol. 124, No. 8, pp. 1049-1058 (2004-8) (in Japanese)