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-Tc superconductor of
Bi1.7Pb0.3Sr2Ca2Cu3Oy system.Comment: 8 pages, 7 figure