Ashraf, M. M., Ullah, M. O., Malik, T. N., Waqas, A. B., Iqbal, M., & Siddiq, F. (2018). Robust Extraction of Harmonics using Heuristic Advanced Gravitational Search Algorithm-based Least Square Estimator. The Nucleus, 54(4), 219–231. https://doi.org/10.71330/thenucleus.2017.273