Nonlocal Gravitational Models and Exact Solutions
  A nonlocal gravity model with a function $f(\Box^{-1} R)$, where $\Box$ is the d'Alembert operator, is considered. The algorithm, allowing to reconstruct $f(\Box^{-1} R)$, corresponding to the given Hubble parameter and the state parameter of the matter, is proposed. Using this algorithm, we find the functions $f(\Box^{-1} R)$, corresponding to de Sitter solutions. 
Sergey Yu. Vernov
astro-ph.CO gr-qc math-ph math.MP nlin.SI