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Abstract
This article has been retracted. Please see the Retraction Notice for more detail: https://doi.org/10.1186/s13660-021-02561-7
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1 Hunan University, College of Finance and Statistics, Changsha, China (GRID:grid.67293.39)
2 Jagiellonian University, Mathematical and Statistical Sciences, Kraków, Poland (GRID:grid.5522.0) (ISNI:0000 0001 2162 9631)