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https://www.sciencedirect.com/science/ar...8116300312
https://www.sciencedirect.com/science/ar...6317302734
https://www.sciencedirect.com/science/ar...0868031500
https://www.sciencedirect.com/science/ar...8116300312
https://www.sciencedirect.com/science/ar...6317302734
https://www.sciencedirect.com/science/ar...0868031500