To cite package ‘diffeqr’ in publications use:

  Rackauckas C, Nie Q (2017). “DifferentialEquations.jl – A Performant
  and Feature-Rich Ecosystem for Solving Differential Equations in
  Julia.” _The Journal of Open Source Software_, *5*(1).
  doi:10.5334/jors.151 <https://doi.org/10.5334/jors.151>, R package
  version 2.1.0,
  <https://openresearchsoftware.metajnl.com/articles/10.5334/jors.151/>.

A BibTeX entry for LaTeX users is

  @Article{,
    doi = {10.5334/jors.151},
    journal = {The Journal of Open Source Software},
    title = {DifferentialEquations.jl – A Performant and Feature-Rich Ecosystem for Solving Differential Equations in Julia},
    author = {Chris Rackauckas and Qing Nie},
    year = {2017},
    volume = {5},
    number = {1},
    url = {https://openresearchsoftware.metajnl.com/articles/10.5334/jors.151/},
    note = {R package version 2.1.0},
  }