TY  - JOUR
AU  - Xue-gang Chen
AU  - Wai Chee Shiu
TI  - A new upper bound on the global defensive alliance number in trees
JO  - The electronic journal of combinatorics
PY  - 2011
VL  - 18
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.37236/689/
DO  - 10.37236/689
ID  - 10_37236_689
ER  -