Kim, Y.-J., Del-Rosario-Calaf, G., Norford, L.K. "Analysis and Experimental Implementation of Grid Frequency Regulation Using Behind-the-Meter Batteries Compensating for Fast Load Demand Variations" IEEE Transactions on power-systems 32, 1, pp. 484 - 498. 2017 DOI: 10.1109/TPWRS.2016.2561258