@misc{indiciae7409dff4adff,
  title = {Numerical Differentiation for Adaptively Refined Finite Element Meshes},
  author = {Cwik, T. and Borgioli, A.},
  year = {1998},
  url = {https://ntrs.nasa.gov/citations/20210005406},
  note = {Source identifier: 20210005406}
}