https://dankelley.r-universe.dev/planhttps://dankelley.r-universe.dev/api/packages/planhttps://dankelley.r-universe.dev/plan/plan.pdfhttps://dankelley.r-universe.dev/plan/doc/manual.htmlhttps://dankelley.r-universe.dev/plan/NEWShttps://dankelley.r-universe.dev/plan/NEWS.txthttps://dankelley.r-universe.dev/plan/citationhttps://dankelley.r-universe.dev/plan/citation.txthttps://dankelley.r-universe.dev/plan/citation.cffhttps://dankelley.r-universe.dev/plan/doc/plan.Rmdhttps://dankelley.r-universe.dev/articles/plan/plan.html