To cite ROI in publications use: Theußl S, Schwendinger F, Hornik K (2020). “ROI: An Extensible R Optimization Infrastructure.” _Journal of Statistical Software_, *94*(15), 1-64. doi:10.18637/jss.v094.i15 . A BibTeX entry for LaTeX users is @Article{, title = {{ROI}: An Extensible {R} Optimization Infrastructure}, author = {Stefan Theu{\ss}l and Florian Schwendinger and Kurt Hornik}, journal = {Journal of Statistical Software}, year = {2020}, volume = {94}, number = {15}, pages = {1--64}, doi = {10.18637/jss.v094.i15}, }