\bib{1998/storjohann} \yr 1998 \mr 99j:65074 \by Arne Storjohann \paper Computing Hermite and Smith normal forms of triangular integer matrices \jour Linear Algebra and its Applications \issn 0024--3795 \vol 282 \pages 25--45 \url http://dx.doi.org/10.1016/S0024-3795(98)10012-5 \endref