@article{article, title = {{Viability of f(R) theories with additional powers of curvature}}, url = {{}}, year = {{2006}}, month = {{9}}, author = {{Brookfield AW and van de Bruck C and Hall LMH}}, doi = {{10.1103/PhysRevD.74.064028}}, volume = {{74}}, journal = {{PHYS REV D}}, issue = {{6}}, note = {{Accessed on 2025/07/20}}}