TY - JOUR AU - Cruz Dombriz, Álvaro de la AU - Dobado González, Antonio AU - López Maroto, Antonio PY - 2009 DO - 10.1103/PhysRevLett.103.179001 SN - 0031-9007 UR - https://hdl.handle.net/20.500.14352/43810 T2 - Physical Review Letters LA - spa PB - American Physical Society KW - Physics TI - Comment on ‘‘Viable singularity-free f(R) gravitywithout a cosmological constant’’ TY - journal article VL - 103 ER -