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North China Electric Power University, School of Economics and Management, Baoding, Hebei, P.R. China |
CORRESPONDING AUTHOR
Yajie Zhao
North China Elect Power Univ, Sch Econ & Management, Baoding, Hebei, Peoples R China, China
Submission date: 2019-06-24
Final revision date: 2019-08-05
Acceptance date: 2019-08-06
Online publication date: 2020-02-10
Publication date: 2020-03-31
Pol. J. Environ. Stud. 2020;29(3):2455–2466