@article{etna_vol11_pp25-42,
  author  = {M. E. Cawood and C. L. Cox},
  title   = {Perturbation analysis for eigenstructure assignment of linear multi-input systems},
  journal = {Electron. Trans. Numer. Anal.},
  volume  = {11},
  year    = {2000},
  pages   = {25--42},
}