Paper  bibtex   

@misc{Farrell2019d,
  author       = {Farrell, Patrick E. and Knepley, Matthew G. and Mitchell, Lawrence and Wechsung, Florian},
  eprint       = {1912.08516},
  eprintclass  = {cs.MS},
  eprinttype   = {arXiv},
  title        = {{PCPATCH: software for the topological construction of multigrid relaxation methods}},
  url          = {https://arxiv.org/abs/1912.08516},
  year         = {2019}
}