@article{Xu:2006,
  author  = "S. Xu and J. Lam and K. Gałkowski and Z. Lin",
  title   = "An LMI approach to the computation of lower bounds for stability margins of 2D discrete systems",
  journal = "Dynamics of Continuous, Discrete and Impulsive Systems : Series B : Applications and Algorithms",
  volume  = "Vol. 13",
  pages   = "221--236",
  year    = "2006",
}