Algebra Structure on Minimal Resolutions of Gorenstein Rings of Embedding Codimension Four. Andrew R. Kustin; Matthew Miller — 1980 Mathematische Zeitschrift
Classification of the Tor-Algebras of Codimension Four Gorenstein Local Rings Andrew R. Kustin; Matthew Miller — 1985 Mathematische Zeitschrift
A General Resolution for Grade Four Gorenstein Ideals. Andrew R. Kustin; Matthew Miller — 1981 Manuscripta mathematica