Remarks on the Cayley-van der Waerden-Chow form. Achilles, Rüdiger; Stückrad, Jürgen — 2007 Zeszyty Naukowe Uniwersytetu Jagiellońskiego. Universitatis Iagellonicae Acta Mathematica
On the intersection multiplicity of improper components in algebraic geometry Rüdiger Achilles — 1985 Beiträge zur Algebra und Geometrie = Contributions to algebra and geometry
Analytic deviation of ideals and intersection theory of analytic spaces. Rüdiger Achilles; Mirella Manaresi — 1993 Manuscripta mathematica