Research on Evaluation of Working Capital Management Efficiency of Electric Power Listed CompaniesHong Liu, Ji Xuan Pan, Han Qing Yuan, Hui Ling Li, Jing Wang, Jia Jun Wang and Xiao Hua SongE3S Web Conf., 251 (2021) 01095DOI: https://doi.org/10.1051/e3sconf/202125101095