Infinitesimal deformations of quotient surface singularities Kurt Behnke; Constantin Kahn; Oswald Riemenschneider — 1988 Banach Center Publications
Reflexive modules on minimally elliptic singularities. Constantin P. Kahn — 1989 Mathematische Annalen
Singularities of the moduli spaces of certain abelian surfaces Klaus Hulek; Constantin Kahn; Steven H. Weintraub — 1991 Compositio Mathematica