https://opasche.r-universe.dev/EQRNhttps://opasche.r-universe.dev/api/packages/EQRNhttps://opasche.r-universe.dev/EQRN/EQRN.pdfhttps://opasche.r-universe.dev/EQRN/doc/manual.htmlhttps://opasche.r-universe.dev/EQRN/NEWShttps://opasche.r-universe.dev/EQRN/NEWS.txthttps://opasche.r-universe.dev/EQRN/citationhttps://opasche.r-universe.dev/EQRN/citation.txthttps://opasche.r-universe.dev/EQRN/citation.cff