1. Graphs & Digraphs: Third Edition;Chartrand,1996
2. Offensive alliances in graphs;Favaron,2002
3. A note on defensive alliances in graphs;Fricke;Bull. Inst. Combin. Appl.,2003
4. Global defensive alliances in graphs;Haynes;The Electron J. Combin.,2003
5. A characterization of trees with equal domination and global strong alliance numbers;Haynes;Utilitas Math.,2004