@article{ttk,
  author = "Julien Tierny and Guillaume Favelier and Joshua A. Levine and Charles Gueunet and Michael Michaux",
  title = "The {T}opology {T}ool{K}it",
  journal = "IEEE Transactions on Visualization and Computer Graphics (Proc. of IEEE VIS)",
  year = "2017",
  note = "\url{https://topology-tool-kit.github.io/}"
}