1. L. Avramov and J. Herzog, The Koszul algebra of a codimension 2 embedding, Math. Z. 175 (1980), 249–280.
2. D. Buchsbaum and D. Eisenbud, Algebraic structures for finite free resolutions, and some structure theorems for ideals of codimension 3, Advances in Math. 18 (1975), 245–301.
3. R.-O. Buchweitz, Contributions à la théorie des singularities, Thesis, Univ. Paris VII (1981).
4. D. Eisenbud and C. Huneke, Ideals with a regular sequence as syzygy, in Appendix to: A. Beauville, Sur les hypersurfaces dont les sections hyperplanes sont à module constant, in The Grothendieck Festschrift, (P. Cartier et al., eds.), vol. I, Birkhäuser, Boston-Basel-Berlin, 1990, pp. 121–132.
5. J. Herzog and M. Miller, Gorenstein ideals of deviation two, Comm. Algebra 13 (1985), 1977–1990.