TY  - GEN
AU  - Chartrand, Gary 
AU  - Lesniak, Linda
AU  - Zhang, Ping
TI  - Graphs & digraphs
SN  - 9781439826270
PY  - 2011///
CY  - Boca Raton
PB  - Chapman and Hall/CRC Press
KW  - Graphs
KW  - Digraphs
ER  -