https://erickchacon.r-universe.dev/spifahttps://erickchacon.r-universe.dev/api/packages/spifahttps://erickchacon.r-universe.dev/spifa/doc/manual.pdfhttps://erickchacon.r-universe.dev/spifa/doc/manual.htmlhttps://erickchacon.r-universe.dev/spifa/NEWShttps://erickchacon.r-universe.dev/spifa/NEWS.txthttps://erickchacon.r-universe.dev/spifa/citationhttps://erickchacon.r-universe.dev/spifa/citation.txthttps://erickchacon.r-universe.dev/spifa/citation.cffhttps://erickchacon.r-universe.dev/spifa/doc/vg03-advanced-features.Rmdhttps://erickchacon.r-universe.dev/articles/spifa/vg03-advanced-features.htmlhttps://erickchacon.r-universe.dev/spifa/doc/spifa.Rmdhttps://erickchacon.r-universe.dev/articles/spifa/spifa.htmlhttps://erickchacon.r-universe.dev/spifa/doc/vg01-prepare-data.Rmdhttps://erickchacon.r-universe.dev/articles/spifa/vg01-prepare-data.htmlhttps://erickchacon.r-universe.dev/spifa/doc/vg04-integrated-workflow.Rmdhttps://erickchacon.r-universe.dev/articles/spifa/vg04-integrated-workflow.htmlhttps://erickchacon.r-universe.dev/spifa/doc/vg02-model-types.Rmdhttps://erickchacon.r-universe.dev/articles/spifa/vg02-model-types.html