https://cran.r-universe.dev/prop.comb.RRhttps://cran.r-universe.dev/api/packages/prop.comb.RRhttps://cran.r-universe.dev/prop.comb.RR/prop.comb.RR.pdfhttps://cran.r-universe.dev/prop.comb.RR/doc/manual.htmlhttps://cran.r-universe.dev/prop.comb.RR/citationhttps://cran.r-universe.dev/prop.comb.RR/citation.txthttps://cran.r-universe.dev/prop.comb.RR/citation.cff