https://bsaul.r-universe.dev/smdhttps://bsaul.r-universe.dev/api/packages/smdhttps://bsaul.r-universe.dev/smd/smd.pdfhttps://bsaul.r-universe.dev/smd/doc/manual.htmlhttps://bsaul.r-universe.dev/smd/citationhttps://bsaul.r-universe.dev/smd/citation.txthttps://bsaul.r-universe.dev/smd/citation.cffhttps://bsaul.r-universe.dev/smd/doc/smd_usage.Rmdhttps://bsaul.r-universe.dev/articles/smd/smd_usage.html