S-brane Solutions in Supergravity Theories
  In this paper time dependent solutions of supergravities with dilaton and arbitrary rank antisymmetric tensor field are found. Although the solutions are nonsupersymmetric the equations of motions can be integrated in a simple form. Such supergravity solutions are related to Euclidean or spacelike branes (S-branes). 
Chiang-Mei Chen, Dmitri V. Gal'tsov and Michael Gutperle