https://yingyunl.r-universe.dev/Ritchttps://yingyunl.r-universe.dev/api/packages/Ritchttps://yingyunl.r-universe.dev/Ritc/Ritc.pdfhttps://yingyunl.r-universe.dev/Ritc/doc/manual.htmlhttps://yingyunl.r-universe.dev/Ritc/citationhttps://yingyunl.r-universe.dev/Ritc/citation.txthttps://yingyunl.r-universe.dev/Ritc/citation.cff