TY  - BOOK
AU  - Shukla, Rajesh K.
TI  - Theory of computation
SN  - 9788131511046
U1  - 511.3  1
PY  - 2009///
CY  - New Delhi
PB  - Cengage Learning
KW  - Regular expressions
KW  - Pushdown automata
KW  - Intractable problems
ER  -