TY  - BOOK
AU  - Loeckx J
TI  - Computability and decidability:  An introduction fo   
T2  - Lecture notes in economics and mathematical systems
U1  - D6,9(B), L2 
PY  - 1972///
CY  - Berlin
PB  - Springer-Verlag          
KW  - Computer Science
ER  -