TY  - BOOK
AU  - Lewis, Harry R.
AU  - Papadimitriou, Christos H. 
TI  - Elements of the theory of computation
SN  - 9788120322332
U1  - 004.1 
PY  - 1998///
CY  - New Delhi
PB  - PHI Learning 
KW  - Machine theory
KW  - Computational complexity
KW  - Formal languages
ER  -