To cite package ‘consrq’ in publications use:

  Tsagris M (2024). _consrq: Constrained Quantile Regression_. R
  package version 1.0, <https://CRAN.R-project.org/package=consrq>.

A BibTeX entry for LaTeX users is

  @Manual{,
    title = {consrq: Constrained Quantile Regression},
    author = {Michail Tsagris},
    year = {2024},
    note = {R package version 1.0},
    url = {https://CRAN.R-project.org/package=consrq},
  }