1. [1] E. Arbarello, M. Cornalba, P. Griffiths, and J. Harris, Geometry of Algebraic Curves, Vol. I, Grundlehren der Mathematischen Wissenschaften [Fundamental Principles of Mathematical Sciences], vol. 267, Springer-Verlag, New York, 1985.
2. [2] K. Behnke, On infinitesimal deformations of minimally elliptic singularities, preprint, 1985.
3. [3] J. Damon, Topological triviality of versal unfoldings of complete intersections, Ann. Inst. Fourier (Grenoble) 34 (1984), no. 4, 225–251.
4. [4] H. Flenner, Divisorenklassengruppen quasihomogener Singularitäten, J. Reine Angew. Math. 328 (1981), 128–160.
5. [5] G.-M. Greuel, Dualität in der lokalen Kohomologie isolierter Singularitäten, Math. Ann. 250 (1980), no. 2, 157–173.