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