@article{etna_vol6_pp246-254,
  author  = {C. A. Thole and S. Mayer and A. Supalov},
  title   = {Fast solution of MSC/NASTRAN sparse matrix problems using a multilevel approach},
  journal = {Electron. Trans. Numer. Anal.},
  volume  = {6},
  year    = {1997},
  pages   = {246--254},
}