https://cjgeyer.r-universe.dev/spedhttps://cjgeyer.r-universe.dev/api/packages/spedhttps://cjgeyer.r-universe.dev/sped/sped.pdfhttps://cjgeyer.r-universe.dev/sped/doc/manual.htmlhttps://cjgeyer.r-universe.dev/sped/citationhttps://cjgeyer.r-universe.dev/sped/citation.txthttps://cjgeyer.r-universe.dev/sped/citation.cffhttps://cjgeyer.r-universe.dev/sped/doc/sped.Rnwhttps://cjgeyer.r-universe.dev/articles/sped/sped.pdf