Hung Son, Le <br/><br/>
Matric Criterions for the Extension of Solutions of a General Linear System of Partial Differential Equations 
Le Hung Son 
 - Darmstadt  Technische Hochschule Darmstadt  1986 
 - 15 p  29 cm 
 - Preprint  955 .
<br/><br/> Contine bibliografie