https://cran.r-universe.dev/eiopt2https://cran.r-universe.dev/api/packages/eiopt2https://cran.r-universe.dev/eiopt2/eiopt2.pdfhttps://cran.r-universe.dev/eiopt2/doc/manual.htmlhttps://cran.r-universe.dev/eiopt2/citationhttps://cran.r-universe.dev/eiopt2/citation.txthttps://cran.r-universe.dev/eiopt2/citation.cff