@misc{indiciae470052b50bfb,
  title = {Unstructured multigrid through agglomeration},
  author = {Venkatakrishnan, V. and Mavriplis, D. J. and Berger, M. J.},
  year = {1993},
  url = {https://ntrs.nasa.gov/citations/19940017011},
  note = {Source identifier: 19940017011}
}