https://bartjanvanrossum.r-universe.dev/factReghttps://bartjanvanrossum.r-universe.dev/api/packages/factReghttps://bartjanvanrossum.r-universe.dev/factReg/factReg.pdfhttps://bartjanvanrossum.r-universe.dev/factReg/doc/manual.htmlhttps://bartjanvanrossum.r-universe.dev/factReg/NEWShttps://bartjanvanrossum.r-universe.dev/factReg/NEWS.txthttps://bartjanvanrossum.r-universe.dev/factReg/citationhttps://bartjanvanrossum.r-universe.dev/factReg/citation.txthttps://bartjanvanrossum.r-universe.dev/factReg/citation.cff