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Continue to ChatOn difference of Zagreb indices - https://avesis.yyu.edu.tr/publication/details/6a8dc7ed-f1ed-4c76-832d-9c974567bd55/on-difference-of-zagreb-indices
On difference of Zagreb indices - https://avesis.yyu.edu.tr/publication/details/6a8dc7ed-f1ed-4c76-832d-9c974567bd55/on-difference-of-zagreb-indices