TY  - BOOK
AU  - Panigrahi, Pratima
AU  - Rao, S. B.
TI  - Graph theory: Research Directions 
SN  - 9788173199974
U1  - 511.5 
PY  - 2011///
CY  - New Delhi
PB  - Narosa Publishing House
KW  - Labeling of graphs
ER  -