Shapiro and parametric resonances in coupled Josephson junctions
  The effect of microwave irradiation on the phase dynamics of intrinsic Josephson junctions in high temperature superconductors is investigated. We compare the current-voltage characteristics for a stack of coupled Josephson junctions under external irradiation calculated in the framework of CCJJ and CCJJ+DC models. 
Ma. A. Gaafar, Yu. M. Shukrinov, A. Foda
cond-mat.supr-con