Total entropy production fluctuation theorems in a nonequilibrium   time-periodic steady state
  We investigate the total entropy production of a Brownian particle in a driven bistable system. This system exhibits the phenomenon of stochastic resonance. We show that in the time-periodic steady state, the probability density function for the total entropy production satisfies Seifert's integral and detailed fluctuation theorems over finite time trajectories. 
Sourabh Lahiri and A. M. Jayannavar