https://cran.r-universe.dev/mod2rmhttps://cran.r-universe.dev/api/packages/mod2rmhttps://cran.r-universe.dev/mod2rm/mod2rm.pdfhttps://cran.r-universe.dev/mod2rm/doc/manual.htmlhttps://cran.r-universe.dev/mod2rm/citationhttps://cran.r-universe.dev/mod2rm/citation.txthttps://cran.r-universe.dev/mod2rm/citation.cff