@article{DMGT_2007_27_1_a12,
     author = {Rodr{\'\i}guez-Velazquez, Juan and Almira, Jose},
     title = {Spectral study of alliances in graphs},
     journal = {Discussiones Mathematicae. Graph Theory},
     pages = {143--157},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {2007},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/DMGT_2007_27_1_a12/}
}