https://jbhasse.r-universe.dev/SystemicRhttps://jbhasse.r-universe.dev/api/packages/SystemicRhttps://jbhasse.r-universe.dev/SystemicR/SystemicR.pdfhttps://jbhasse.r-universe.dev/SystemicR/doc/manual.htmlhttps://jbhasse.r-universe.dev/SystemicR/citationhttps://jbhasse.r-universe.dev/SystemicR/citation.txthttps://jbhasse.r-universe.dev/SystemicR/citation.cff