TY  - BOOK
AU  - LewisH.  R.,
AU  - Papadimitriou C.H.
TI  - Elements of theory of computation 
SN  - 9788120322332
U1  - 511.3 
PY  - 1998/// c) 2011
CY  - New Delhi
PB  - PHI Learning Pvt.  Ltd.
KW  - Theory of Computation
ER  -