https://cran.r-universe.dev/cenGAMhttps://cran.r-universe.dev/api/packages/cenGAMhttps://cran.r-universe.dev/cenGAM/cenGAM.pdfhttps://cran.r-universe.dev/cenGAM/doc/manual.htmlhttps://cran.r-universe.dev/cenGAM/citationhttps://cran.r-universe.dev/cenGAM/citation.txthttps://cran.r-universe.dev/cenGAM/citation.cff