F. G. Alvarenga, M.J.S. Houndjo, A. V. Monwanou, J.B.C. Orou,
f(R,T) gravity from null energy condition,
Blucher Physics Proceedings,
Volume 1,
2014,
Pages 44-46,
ISSN 23582359,
http://dx.doi.org/10.5151/phypro-ecfa-021
(www.proceedings.blucher.com.br/article-details/frt-gravity-from-null-energy-condition-10994)
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