@ARTICLE{DoeRu98,
  author = {D{\"{o}}rfler, W. and Rumpf, M.},
  title = {An adaptive strategy for elliptic problems including a posteriori
	controlled boundary approximation},
  journal = {Mathematics of Computation},
  year = {1998},
  volume = {67},
  pages = {1361--1382},
  number = {224},
  owner = {fast}
}