https://refunders.r-universe.dev/refund.shinyhttps://refunders.r-universe.dev/api/packages/refund.shinyhttps://refunders.r-universe.dev/refund.shiny/refund.shiny.pdfhttps://refunders.r-universe.dev/refund.shiny/doc/manual.htmlhttps://refunders.r-universe.dev/refund.shiny/NEWShttps://refunders.r-universe.dev/refund.shiny/NEWS.txthttps://refunders.r-universe.dev/refund.shiny/citationhttps://refunders.r-universe.dev/refund.shiny/citation.txthttps://refunders.r-universe.dev/refund.shiny/citation.cff