TY  - BOOK
AU  - Hopcroft John E
AU  - Ullman Jeffery D
TI  - Introduction to Automata Theory, Languages and Computation
SN  - 8185015961
U1  - 005.13 
PY  - 1990///
CY  - New Delhi
PB  - Narosa
KW  - Finite automata & regular expression
KW  - Undecidability
KW  - Deterministic context-free languages
ER  -