https://davzim.r-universe.dev/RITCHhttps://davzim.r-universe.dev/api/packages/RITCHhttps://davzim.r-universe.dev/RITCH/RITCH.pdfhttps://davzim.r-universe.dev/RITCH/doc/manual.htmlhttps://davzim.r-universe.dev/RITCH/NEWShttps://davzim.r-universe.dev/RITCH/NEWS.txthttps://davzim.r-universe.dev/RITCH/citationhttps://davzim.r-universe.dev/RITCH/citation.txthttps://davzim.r-universe.dev/RITCH/citation.cff