@misc{1200791,
  author = {William F Mitchell},
  title = {A collection of 2D elliptic problems for testing adaptive algorithms:},
  year = {2010},
  month = {2010-01-01 05:01:00},
  publisher = {, National Institute of Standards and Technology, Gaithersburg, MD},
  doi = {https://doi.org/10.6028/NIST.IR.7668},
  language = {en},
}