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3. “Gas Turbine Forecast,” in Forecast International (2004, 2005, 2007).
4. H. Nenhoff and K. Thoren, “GT24 and GT26 Gas Turbine — Sequential Combustion the Key to High Efficiencies,” ABB Review, No. 2 (1994).
5. B. Becker, The 3-A-Series Gas Turbines with HBR Combustors, ASME-paper 95-GT-458.