https://wenjie2wang.r-universe.dev/splines2https://wenjie2wang.r-universe.dev/api/packages/splines2https://wenjie2wang.r-universe.dev/splines2/splines2.pdfhttps://wenjie2wang.r-universe.dev/splines2/doc/manual.htmlhttps://wenjie2wang.r-universe.dev/splines2/NEWShttps://wenjie2wang.r-universe.dev/splines2/NEWS.txthttps://wenjie2wang.r-universe.dev/splines2/citationhttps://wenjie2wang.r-universe.dev/splines2/citation.txthttps://wenjie2wang.r-universe.dev/splines2/citation.cffhttps://wenjie2wang.r-universe.dev/splines2/doc/splines2-intro.Rmdhttps://wenjie2wang.r-universe.dev/articles/splines2/splines2-intro.htmlhttps://wenjie2wang.r-universe.dev/splines2/doc/splines2-wi-rcpp.Rmdhttps://wenjie2wang.r-universe.dev/articles/splines2/splines2-wi-rcpp.html