The Edge-of-Wedge Theorem for Systems of Constant Coefficient Partial Differential Operators. I. Otto Liess — 1988 Mathematische Annalen
The Edge-of-Wedge Theorem for Systems of Constant Coefficient Partial Differential Operators. II. Otto Liess — 1988 Mathematische Annalen
On the Influence of Lower Order Terms for Propagation of Analytic Singularities for Operators with Constant Coefficients. Otto Liess — 1988 Mathematische Zeitschrift
Microlocal solvability of the Cauchy problem and boundary regularity Otto Liess — 1987 Banach Center Publications
Global existence for the nonlinear equations of crystal optics Otto Liess — 1989 Journées équations aux dérivées partielles
Antilocality of complex powers of elliptic differential operators with analytic coefficients Otto Liess — 1982 Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
A general class of Gevrey-type pseudo differential operators Otto Liess; Luigi Rodino — 1983 Journées équations aux dérivées partielles