TY  - BOOK
AU  - Köbler, Johannes
TI  - The graph isomorphism problem : : its structural complexity 
SN  - 9781461267126
U1  - 511.5 
PY  - 1993///
CY  - New York
PB  - Springer
KW  - Graph Theory
KW  - Mathematics
KW  - Graph Isomorphism
ER  -