https://ralmond.r-universe.dev/Proc4https://ralmond.r-universe.dev/api/packages/Proc4https://ralmond.r-universe.dev/Proc4/Proc4.pdfhttps://ralmond.r-universe.dev/Proc4/doc/manual.htmlhttps://ralmond.r-universe.dev/Proc4/citationhttps://ralmond.r-universe.dev/Proc4/citation.txthttps://ralmond.r-universe.dev/Proc4/citation.cffhttps://ralmond.r-universe.dev/Proc4/doc/Listeners.Rmdhttps://ralmond.r-universe.dev/articles/Proc4/Listeners.htmlhttps://ralmond.r-universe.dev/Proc4/doc/Proc4Arch.Rmdhttps://ralmond.r-universe.dev/articles/Proc4/Proc4Arch.htmlhttps://ralmond.r-universe.dev/Proc4/doc/Dongle.Rmdhttps://ralmond.r-universe.dev/articles/Proc4/Dongle.html