id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
app01-2404	De Laurentis, Mariafelicia; De Martino, Ivan	Testing f(R)-Theories by Binary Pulsars	2014	4	.pdf	application/pdf	2433	105	62	In- stead for most of binaries we have f ′′0 values that can surely rule out the theory, since taking account of the weak field assumption we obtain 38 ≤ f ′′0 ≤ 4 × 107. ︸ ︷︷ ︸ f(R) 〉 , (5) where we point out that for f ′′0 → 0 and f ′0 → 4 3 , the previous equation becomes 〈 dE dt 〉 ︸ ︷︷ ︸ (GR)	cache/app01-2404.pdf	txt/app01-2404.txt