TY  - BOOK
AU  - Lascar Richard
TI  - Propagation des singularites des solutiond' equations pseudo-difeerntielles a caracterstiques de multipilcites variable
T2  - Lecture notes in mathematics; 856
U1  - B27, 122M0 
PY  - 1980///
CY  - Berlin
PB  - Springer Verlag        
KW  - Group theory
ER  -