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José W. Maluf, Andreas Kneip, “Gravitational energy of conical defects”, Journal of Mathematical Physics, 38:1 (1997), 458
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José W. Maluf, “On the distribution of gravitational energy in the de Sitter space”, Journal of Mathematical Physics, 37:12 (1996), 6293
J. W. Maluf, E. F. Martins, A. Kneip, “Gravitational energy of rotating black holes”, Journal of Mathematical Physics, 37:12 (1996), 6302
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