@article{11110,
  author = {Are Bruaset and Bj{\o}rn Nielsen},
  title = {On the Stability of Pressure and Velocity Computations for Heterogeneous Reservoirs},
  year = {1996},
  journal = {SIAM J. Appl. Math.},
  volume = {56},
  number = {4},
  pages = {991-1007,},
}