https://bayerse.r-universe.dev/esreghttps://bayerse.r-universe.dev/api/packages/esreghttps://bayerse.r-universe.dev/esreg/esreg.pdfhttps://bayerse.r-universe.dev/esreg/doc/manual.htmlhttps://bayerse.r-universe.dev/esreg/NEWShttps://bayerse.r-universe.dev/esreg/NEWS.txthttps://bayerse.r-universe.dev/esreg/citationhttps://bayerse.r-universe.dev/esreg/citation.txthttps://bayerse.r-universe.dev/esreg/citation.cff