Elliptic regularity and solvability for partial differential equations with Colombeau coefficients. Hormann, Gunther; Oberguggenberger, Michael — 2004 Electronic Journal of Differential Equations (EJDE) [electronic only]
A note on representations of the finite Heisenberg group and sums of greatest common divisors. Grassberger, Johannes; Hörmann, Günther — 2001 Discrete Mathematics and Theoretical Computer Science. DMTCS [electronic only]
Comparison of Some Solution Concepts for Linear First-order Hyperbolic Differential Equations With Non-smooth Coefficients Simon Haller; Günther Hörmann — 2008 Publications de l'Institut Mathématique