Pahadasingh, Sunita, et al. “Closed-Loop Tuning of Cascade Controller for Load Frequency Control of Multi-Area Distributed Generation Resources Optimized by ASOS Algorithm”. Indonesian Journal of Electrical Engineering and Informatics (IJEEI), vol. 10, no. 2, May 2022, pp. 263-72, https://doi.org/10.52549/ijeei.v10i2.3524.