151 citations · 994 across the 15 of their papers we have counts for
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gr-qc2013★ 54 cited
Expansion-free Cylindrically Symmetric Models
M. Sharif, Z. Yousaf
This paper investigates cylindrically symmetric distribution of an-isotropic fluid under the expansion-free condition, which requires the existence of vacuum cavity within the flui…
gr-qc2013★ 30 cited
Shearfree Spherically Symmetric Fluid Models
M. Sharif, Z. Yousaf
We try to find some exact analytical models of spherically symmetric spacetime of collapsing fluid under shearfree condition. We consider two types of solutions: one is to impose a…