Volterra Models in Load Leveling Problem Denis Sidorov, Alexey Zhukov, Aoife Foley, Aleksandr Tynda, Ildar Muftahov, Daniil Panasetsky and Yong Li E3S Web Conf., 69 (2018) 01015 Published online: 27 November 2018 DOI: 10.1051/e3sconf/20186901015