https://cran.r-universe.dev/PMLE4SCRhttps://cran.r-universe.dev/api/packages/PMLE4SCRhttps://cran.r-universe.dev/PMLE4SCR/PMLE4SCR.pdfhttps://cran.r-universe.dev/PMLE4SCR/doc/manual.htmlhttps://cran.r-universe.dev/PMLE4SCR/citationhttps://cran.r-universe.dev/PMLE4SCR/citation.txthttps://cran.r-universe.dev/PMLE4SCR/citation.cffhttps://cran.r-universe.dev/PMLE4SCR/doc/PMLE4SCR-introduction.Rmdhttps://cran.r-universe.dev/articles/PMLE4SCR/PMLE4SCR-introduction.html