@article{etna_vol31_pp384-402,
  author  = {Bedřich Soused{\'i}k and Jan Mandel},
  title   = {On the equivalence of primal and dual substructuring preconditioners},
  journal = {Electron. Trans. Numer. Anal.},
  volume  = {31},
  year    = {2008},
  pages   = {384--402},
}