@article{11073,
  author = {Bj{\o}rn Nielsen and Aslak Tveito},
  title = {On the Approximation of the Solution of the Pressure Equation by Changing the Domain},
  year = {1997},
  journal = {SIAM J. Appl. Math.},
  volume = {57},
  number = {1},
  pages = {15-33,},
}