G. G. Subramanian, I. A. Chidambaram, and J. S. Manoharan, “Flower Pollination Algorithm Based PDFF Controller for a Two-Area Interconnected Thermal Power System with Gas / Diesel Units”, Glob. J. Energ. Technol. Res. Updat., vol. 4, no. 1, pp. 26–34, Dec. 2017.