@inbook{12510,
  author = {E. Gundersen and Hans Langtangen},
  title = {Finite Element Methods for Two-Phase Flow in Heterogeneous Porous Media},
  year = {1997},
  journal = {Numerical Methods and Software Tools in Industrial Mathematics},
  publisher = {Birkh{\"a}user},
  editor = {M. D{\ae}hlen and Aslak Tveito},
}