https://darrenjw.r-universe.dev/smfsbhttps://darrenjw.r-universe.dev/api/packages/smfsbhttps://darrenjw.r-universe.dev/smfsb/smfsb.pdfhttps://darrenjw.r-universe.dev/smfsb/doc/manual.htmlhttps://darrenjw.r-universe.dev/smfsb/citationhttps://darrenjw.r-universe.dev/smfsb/citation.txthttps://darrenjw.r-universe.dev/smfsb/citation.cffhttps://darrenjw.r-universe.dev/smfsb/doc/smfsb.Snwhttps://darrenjw.r-universe.dev/articles/smfsb/smfsb.pdf