%0 Journal Article %T Sliding Mode Control for Markovian Switching Singular Systems with Time-Varying Delays and Nonlinear Perturbations %A Guowei Yang %A Yonggui Kao %A Wei Li %J Discrete Dynamics in Nature and Society %D 2013 %I Hindawi Publishing Corporation %R 10.1155/2013/507828 %U http://dx.doi.org/10.1155/2013/507828