Non-Uniqueness and Uniqueness in the Cauchy Problem at Simple Characteristic Points. Jan Persson — 1973 Mathematische Annalen
The Cauchy Problem and Hadamard's Example Jan Persson — 1976 Publications mathématiques et informatique de Rennes
A Note on Formal and Analytic Cauchy Problems for Systems with Constant Coefficients. Jan Persson — 1964 Mathematica Scandinavica
A Boundary Problem for Analytic Linear Systems with Data on Intersecting Hyperplanes. Jan Persson — 1964 Mathematica Scandinavica
Fundamental theorems for linear measure differential equations. Jan Persson — 1988 Mathematica Scandinavica
Distribution differential equations. Regularization and bending of a rod. Jan Persson — 1990 Mathematica Scandinavica
The Cauchy problem and Hadamard's example Jan Persson — 1976 Journées équations aux dérivées partielles
The Fourier transform on L loc 1 and its application to Cauchy problems for linear partial differential equations Jan Persson — 1971 Rendiconti del Seminario Matematico della Università di Padova
Global linear Goursat problems for functions of Gevrey-Lednev type Jan Persson — 1969 Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
The function classes γ H ( β , δ , d ) and global linear Goursat problems Jan Persson — 1970 Annali della Scuola Normale Superiore di Pisa - Classe di Scienze
Linear Goursat problems for entire functions when the coefficients are variable Jan Persson — 1969 Annali della Scuola Normale Superiore di Pisa - Classe di Scienze