@article{etna_vol53_pp562-591,
  author  = {Alexander Heinlein and Axel Klawonn and Martin Lanser and Janine Weber},
  title   = {A frugal FETI-DP and BDDC coarse space for heterogeneous problems},
  journal = {Electron. Trans. Numer. Anal.},
  volume  = {53},
  year    = {2020},
  pages   = {562--591},
  doi     = {10.1553/etna_vol53s562},
}