https://cran.r-universe.dev/Design.parametershttps://cran.r-universe.dev/api/packages/Design.parametershttps://cran.r-universe.dev/Design.parameters/Design.parameters.pdfhttps://cran.r-universe.dev/Design.parameters/doc/manual.htmlhttps://cran.r-universe.dev/Design.parameters/citationhttps://cran.r-universe.dev/Design.parameters/citation.txthttps://cran.r-universe.dev/Design.parameters/citation.cff