Abstract
An internal singularity of a string four-dimensional black hole with second order curvature corrections is investigated. A restriction to a minimal size of a neutral black hole is obtained in the frame of the model considered. Vacuum polarization of the surrounding space-time caused by this minimal-size black hole is also discussed.
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Alexeyev, S.O., Sazhin, M.V. Some aspects of four-dimensional black hole solutions in gauss-bonnet extended string gravity. J Astrophys Astron 20, 259–268 (1999). https://doi.org/10.1007/BF02702357
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DOI: https://doi.org/10.1007/BF02702357