@misc{12076,
  author = {Hans Langtangen and T. Rusten and Aslak Tveito and S. Wille},
  title = {An Element by Element Preconditioner for Iterative Equation Solvers},
  year = {1986},
  journal = {Talk at the 2nd International Conference on Finite Element Methods in Water Resources, Lisboa, Portugal},
  note = {Presented by A. Tveito},
}