Movie accompanying the paper:

Dark spherical shell solitons in three-dimensional Bose-Einstein condensates: Existence, stability, and dynamics.
Wenlong Wang, P.G. Kevrekidis, R. Carretero-González, and D.J. Frantzeskakis.
Phys. Rev. A 93 (2016) 023630.

Movie: [ avi ] Animation depicting the stable oscillations of a dark soliton shell (DSS).
The top and bottom panels depict, respectively, a cut and the two-dimensional
projection of the (square root of the) density. The white lines and red dots
follow the size of the DSS.