https://alicja-januszkiewicz.r-universe.dev/stddiff.sparkhttps://alicja-januszkiewicz.r-universe.dev/api/packages/stddiff.sparkhttps://alicja-januszkiewicz.r-universe.dev/stddiff.spark/stddiff.spark.pdfhttps://alicja-januszkiewicz.r-universe.dev/stddiff.spark/doc/manual.htmlhttps://alicja-januszkiewicz.r-universe.dev/stddiff.spark/NEWShttps://alicja-januszkiewicz.r-universe.dev/stddiff.spark/NEWS.txthttps://alicja-januszkiewicz.r-universe.dev/stddiff.spark/citationhttps://alicja-januszkiewicz.r-universe.dev/stddiff.spark/citation.txthttps://alicja-januszkiewicz.r-universe.dev/stddiff.spark/citation.cff