@misc{63561,
  author = {William Mitchell},
  title = {A Collection of 2D Elliptic Problems for Testing Adaptive Algorithms},
  year = {2010},
  month = {2010-02-26},
  publisher = {NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD},
  url = {https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=904956},
  language = {en},
}