To cite causaloptim in publications use:

Sachs MC, Sjölander A, Gabriel EE (2020). causaloptim: An Interface to Specify Causal Graphs and Compute Bounds on Causal Effects. R package version 0.7.1, https://github.com/sachsmc/causaloptim.

Corresponding BibTeX entry:

  @Manual{,
    title = {causaloptim: An Interface to Specify Causal Graphs and
      Compute Bounds on Causal Effects},
    author = {Michael C. Sachs and Arvid Sjölander and Erin E Gabriel},
    year = {2020},
    note = {R package version 0.7.1},
    url = {https://github.com/sachsmc/causaloptim},
  }