A combinatorial approach to involution and δ-regularity I: involutive bases in polynomial algebras of solvable type Werner M. Seiler OriginalPaper 31 July 2009 Pages: 207 - 259
A combinatorial approach to involution and δ-regularity II: structure analysis of polynomial modules with pommaret bases Werner M. Seiler OriginalPaper 04 August 2009 Pages: 261 - 338