Self-similar perfect fluids
arXiv:gr-qc/0005066
Abstract
Space-times admitting an -parameter Lie group of homotheties are studied for devoting a special attention to those representing perfect fluid solutions to Einstein's field equations.
Latex 5 pages. Published in: Relativistic Astrophysics and Cosmology". Edt. J. Buitrago, E. Mediavilla and Oscoz; World Scientific. pp. 211-215 (1997)