TY  - BOOK
AU  - Leeuwen, Jan Van., ed.
TI  - Handbook of theoretical computer science - v.A: algorithms and complexity
T2  - Hand book of theoritical computer science
SN  - 0444880747
U1  - 004 
PY  - 1990///
CY  - Amsterdam
PB  - Elsevier publications
ER  -