Collapse of non-spherically symmetric scalar field distributions
  In the present work the collapse scenario of some exact non-spherical models with a minimally coupled scalar field is studied. Scalar field collapse with planar as well as toroidal, cylindrical and pseudoplanar symmetries have been investigated. It is shown that the scalar field may have collapsing modes even if it has the equation of state corresponding to that of a dark energy. 
Koyel Ganguly and Narayan Banerjee
gr-qc