Abstract
We search for vacuum solutions of a spherically symmetric and static field for the nineparameterR+R 2 gravitational theories in a weak-field limit. In this paper approximate solutions of torsion are obtained.
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Zhang, Y.Z., Guan, K.Y. Approximate solutions for theR +R 2 theories of gravitation: Torsion components. Gen Relat Gravit 16, 835–845 (1984). https://doi.org/10.1007/BF00762937
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DOI: https://doi.org/10.1007/BF00762937