Pure multiplicative stochastic resonance of anti-tumor model with   seasonal modulability
  The effects of pure multiplicative noise on stochastic resonance in an anti-tumor system modulated by a seasonal external field are investigated by using theoretical analyses of the generalized potential and numerical simulations. For optimally selected values of the multiplicative noise intensity quasi-symmetry of two potential minima and stochastic resonance are observed. Theoretical results and numerical simulations are in good quantitative agreement. 
Wei-Rong Zhong, Yuan-Zhi Shao, Zhen-Hui He