Double stochastic resonance in conductors with narrow conduction band
  Results are presented of studying the stochastic resonance (SR) in conductors with bcc lattice and narrow conduction band. In such materials, SR has a feature, namely, the weak-signal gain as a function of the additive and non-correlated noise level can have two maxima, i.e., double SR takes place. 
E. M. Epshtein, T. A. Gorshenina, G. M. Shmelev