https://mthrun.r-universe.dev/GeneralizedUmatrixhttps://mthrun.r-universe.dev/api/packages/GeneralizedUmatrixhttps://mthrun.r-universe.dev/GeneralizedUmatrix/GeneralizedUmatrix.pdfhttps://mthrun.r-universe.dev/GeneralizedUmatrix/doc/manual.htmlhttps://mthrun.r-universe.dev/GeneralizedUmatrix/citationhttps://mthrun.r-universe.dev/GeneralizedUmatrix/citation.txthttps://mthrun.r-universe.dev/GeneralizedUmatrix/citation.cffhttps://mthrun.r-universe.dev/GeneralizedUmatrix/doc/GeneralizedUmatrix.Rmdhttps://mthrun.r-universe.dev/articles/GeneralizedUmatrix/GeneralizedUmatrix.html