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Continue to ChatGravitational energy in quadratic-curvature gravities - https://avesis.metu.edu.tr/yayin/d9c84ff8-be9e-4ced-a8a3-b5ddebd1416b/gravitational-energy-in-quadratic-curvature-gravities
Gravitational energy in quadratic-curvature gravities - https://avesis.metu.edu.tr/yayin/d9c84ff8-be9e-4ced-a8a3-b5ddebd1416b/gravitational-energy-in-quadratic-curvature-gravities