TY  - BOOK
AU  - Choffrut C
ED  - Symposium on theoretical Aspects of Computer Science( 8th : 1991 : Germany )
ED  - Symposium on theoretical Aspects of Computer Science 8th
TI  - STACS 91 : proceedings
U1  - 4 
PY  - 1991///
CY  - Berlin
PB  - Springer Verlag
KW  - Computer science
ER  -