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Towards singularity- and ghost-free theories of gravity.
Biswas T, Gerwick E, Koivisto T, Mazumdar A. Biswas T, et al. Among authors: gerwick e. Phys Rev Lett. 2012 Jan 20;108(3):031101. doi: 10.1103/PhysRevLett.108.031101. Epub 2012 Jan 19. Phys Rev Lett. 2012. PMID: 22400725 Free article.