@article{10_37236_1740,
     author = {Teresa W. Haynes and Stephen T. Hedetniemi and Michael A. Henning},
     title = {Global defensive alliances in graphs},
     journal = {The electronic journal of combinatorics},
     year = {2003},
     volume = {10},
     doi = {10.37236/1740},
     zbl = {1031.05096},
     url = {http://geodesic.mathdoc.fr/articles/10.37236/1740/}
}