Modelling self-organization in DC glow microdischarges: new 3D modes
  Seven new 3D modes of self-organization in DC glow discharges are computed in the framework of the simplest self-consistent model of glow discharge. Some of the modes branch off from and rejoin the 1D mode, while others bifurcate from a 2D or a 3D mode. The patterns associated with computed 3D modes are similar to patterns observed in the experiment. The computed transition from a spot pattern comprising five spots into a pattern comprising a ring spot also was observed in the experiment. 
P. G. C. Almeida, M. S. Benilov, and D. F. N. Santos
physics.plasm-ph