TY - GEN T1 - Viability of f(R) Theories with Additional Powers of Curvature T2 - arXiv PY - 2006/08/02 AU - Brookfield AW AU - van de Bruck C AU - Hall LMH ED - DO - DOI: 10.48550/arxiv.hep-th/0608015 Y2 - 2024/12/22 ER -