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Continue to ChatOn ps-Drazin inverses in a ring - https://avesis.ankara.edu.tr/yayin/e915909f-e9f7-4f6d-9473-808f5cc1c4b8/on-ps-drazin-inverses-in-a-ring
On ps-Drazin inverses in a ring - https://avesis.ankara.edu.tr/yayin/e915909f-e9f7-4f6d-9473-808f5cc1c4b8/on-ps-drazin-inverses-in-a-ring