https://sestelo.r-universe.dev/npregfasthttps://sestelo.r-universe.dev/api/packages/npregfasthttps://sestelo.r-universe.dev/npregfast/npregfast.pdfhttps://sestelo.r-universe.dev/npregfast/doc/manual.htmlhttps://sestelo.r-universe.dev/npregfast/NEWShttps://sestelo.r-universe.dev/npregfast/NEWS.txthttps://sestelo.r-universe.dev/npregfast/citationhttps://sestelo.r-universe.dev/npregfast/citation.txthttps://sestelo.r-universe.dev/npregfast/citation.cff