On amplitude oscillation of vibrations of strongly anisotropic   high-temperature superconductors of BiPbSrCaCuO system
  Effect of oscillations of the vibration amplitude of cylindrical sample suspended by a thin elastic thread and vibrating in a transverse magnetic field and containing 2D quasi-two-dimensional vortices (pancakes), was observed in the strongly anisotropic high-$T_{c}$ superconductor of $Bi_{1.7}Pb_{0.3}Sr_{2}Ca_{2}Cu_{3}O_{y}$ system. 
J. G. Chigvinadze, A. A. Iashvili, T. V. Machaidze