https://jessevent.r-universe.dev/pingershttps://jessevent.r-universe.dev/api/packages/pingershttps://jessevent.r-universe.dev/pingers/pingers.pdfhttps://jessevent.r-universe.dev/pingers/doc/manual.htmlhttps://jessevent.r-universe.dev/pingers/citationhttps://jessevent.r-universe.dev/pingers/citation.txthttps://jessevent.r-universe.dev/pingers/citation.cff