Modified $f(R)$ Gravity and Thermodynamics of Time-Dependent Wormholes   at Event Horizon
  In the context of modified $f(R)$ gravity theory, we study time-dependent wormhole spacetimes in the radiation background. In this framework, we attempt to generalize the thermodynamic properties of time-dependent wormholes in $f(R)$ gravity. Finally, at event horizon, the rate of change of total entropy has been discussed. 
H. Saiedi
gr-qc