Hoffmann, Thomas J., and Nan M. Laird. “Fgui: A Method for Automatically Creating Graphical User Interfaces for Command-Line R Packages”. Journal of Statistical Software 30, no. 2 (April 28, 2009): 1–14. Accessed April 18, 2024. https://www.jstatsoft.org/index.php/jss/article/view/v030i02.