@article{Gałkowski:1999,
  author  = "K. Gałkowski and N. Theodorou and S. Tzafestas",
  title   = "Non-standard State-space Models for 2D Systems",
  journal = "Bulletin of the Polish Academy of Sciences : Mathematics",
  volume  = "Vol. 47",
  number  = "no 1",
  pages   = "91--101",
  year    = "1999",
}